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== History ==
== History ==
At launch, Telstra distinguished the new Smart Phonecard from the older Telstra Phonecard. A contemporary Telstra newspaper advertisement said the new card used ''Smart chip technology'' and was identified by a red arrow. The advertisement stated that Smart Phonecards would only operate in new Telstra Public Payphones displaying the same red arrow, while older green-arrow Phonecards would only operate in older Telstra payphones.<ref name="smh-smart">''Using our new Smart Payphones and Smart Phonecards is easy'', Telstra advertisement, ''The Sydney Morning Herald'', Fairfax Media clipping via Newspapers.com, [https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/](https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/). Accessed 3 May 2026.</ref>
Telstra started issuing phonecards in late 1980s. This first generation of cards were made by Japanese company Anritsu and had the value encoded onto a magnetic stripe, which would be decremented by the payphone. The phone would also punch holes into the card to provide a visual indication of the remaining credit.
 
In 1997, with the introduction of the [[Telstra Smart Payphone]], a new generation of phonecards with a chip was introduced. As these could not be used with older payphones, Telstra introduced a simple colour code: chip cards carried a red arrow matching the red arrow on Smart Payphones, and the older magstripe cards carried a green arrow matching the green arrow on older payphones.<ref name="smh-smart">''Using our new Smart Payphones and Smart Phonecards is easy'', Telstra advertisement, ''The Sydney Morning Herald'', Fairfax Media clipping via Newspapers.com, [https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/](https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/). Accessed 3 May 2026.</ref> This has since been retired as there are no longer any phones remaining that accept magstripe cards.


Telstra also promoted the Smart Phonecard as a possible stored-value payment system beyond payphones, stating that Smart Phonecards would soon be accepted in vending machines for snacks and drinks.<ref name="smh-smart2">''Using our new Smart Payphones and Smart Phonecards is easy'', Telstra advertisement, ''The Sydney Morning Herald'', Fairfax Media clipping via Newspapers.com, [https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/](https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/). Accessed 3 May 2026.</ref> The extent of any later vending-machine rollout is unclear.
Telstra also promoted the Smart Phonecard as a possible stored-value payment system beyond payphones, stating that Smart Phonecards would soon be accepted in vending machines for snacks and drinks.<ref name="smh-smart2">''Using our new Smart Payphones and Smart Phonecards is easy'', Telstra advertisement, ''The Sydney Morning Herald'', Fairfax Media clipping via Newspapers.com, [https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/](https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/). Accessed 3 May 2026.</ref> The extent of any later vending-machine rollout is unclear.


== Technical details ==
== Technical details ==
The Telstra Smart Phonecard is not a PIN card and is not a general-purpose processor smartcard in the same sense as a SIM card or banking card. It is a synchronous contact memory/counter card. Telstra's current Phonecard information states that no PIN or access number is required, and that the card is used simply by inserting it into a Telstra payphone and dialling.<ref name="telstra-phonecard-page">''Calling cards'', Telstra, [https://www.telstra.com.au/phone-line/calling-cards](https://www.telstra.com.au/phone-line/calling-cards). Accessed 3 May 2026.</ref>
The chip used in the Telstra Smart Phonecard has been identified by hobbyist and collector testing as the '''Siemens/Infineon SLE 4436''' family. The SLE 4436/36E was specifically designed for prepaid telephone-card applications. Manufacturer information describes it as containing 221 bits of EEPROM memory, 16 bits of ROM, a control/security unit, and a computing unit for chip authentication.<ref name="sle4436">''SLE 4436/36E Short Product Information'', Infineon Technologies, [https://cardplus.ru/wp-content/themes/new_templete/files/sle4436.pdf](https://cardplus.ru/wp-content/themes/new_templete/files/sle4436.pdf). Accessed 3 May 2026.</ref>
The chip used in the Telstra Smart Phonecard has been identified by hobbyist and collector testing as the '''Siemens/Infineon SLE 4436''' family. The SLE 4436/36E was specifically designed for prepaid telephone-card applications. Manufacturer information describes it as containing 221 bits of EEPROM memory, 16 bits of ROM, a control/security unit, and a computing unit for chip authentication.<ref name="sle4436">''SLE 4436/36E Short Product Information'', Infineon Technologies, [https://cardplus.ru/wp-content/themes/new_templete/files/sle4436.pdf](https://cardplus.ru/wp-content/themes/new_templete/files/sle4436.pdf). Accessed 3 May 2026.</ref>


The SLE 4436 memory layout includes a counter, identification data such as serial number and expiry date, and data areas.<ref name="sle4436" /> This fits the practical behaviour of a Telstra Smart Phonecard: the payphone can read the card identity and remaining value, decrement the stored credit during chargeable calls, and also store small user-programmed data such as an autodial number.
The chip stores the card serial number, the remaining value on the card, an autodial number of up to 10 digits and certain other data. For security reasons, the chip is programmed to only allow one way writing. Credit cannot be added, it can only be deducted, hence why it is required to exchange the card for a new one if a refund is required. Similarly once an autodial number has been set, it cannot be edited or removed.
 
This one-way memory behaviour also explains why the Telstra Smart Payphone warns that an autodial number can only be programmed into a Phonecard once. Programming the autodial field consumes the relevant writable bits on the card. Because the card cannot erase those bits back to their original state, the payphone cannot safely offer repeated attempts or later edits in the way a normal rewritable memory card could.
 
The card's value storage should be understood as a one-way electronic counter rather than a rewritable balance field. In normal card operation, memory is not erased before writing, so bits can only be programmed from binary '''1''' to binary '''0'''.<ref name="acr38-sle4436">''ACR38x Smart Card Reader Reference Manual'', ACS, section on SLE 4406/SLE 4436/SLE 5536/SLE 6636 memory cards, [https://www.cardlogix.com/wp-content/uploads/ACS-ACR38x-Smart-Card-Reader-Reference-Sheet_6.03.pdf](https://www.cardlogix.com/wp-content/uploads/ACS-ACR38x-Smart-Card-Reader-Reference-Sheet_6.03.pdf). Accessed 3 May 2026.</ref> In practical terms, once a counter bit or value stage has been consumed, ordinary payphone operations cannot turn it back into unused credit. This is more technically accurate than saying the chip is literally ''blown like a fuse'', but the effect is similar: the card is designed for controlled devaluation, not recharging or reuse.


The SLE 4436 also supports write modes intended for telephone-card counter operation, including ''write with carry'' and backup-protected write modes.<ref name="acr38-sle4436" /> The backup mechanism is intended to reduce value corruption if the card is removed during a counter update. Manufacturer information also describes a challenge-response authentication unit, used so the terminal can verify that the card is genuine rather than a simple unprotected memory device.<ref name="sle4436" />
Ranges of serial numbers to invalidate can be sent to payphones in case a batch of phonecards is lost or stolen. This is likely also how cards are invalidated when expired.


Telstra's Phonecard terms state that the card's stored value cannot be increased and that the card ends when the stored value reaches zero or when the end date shown on the card is reached.<ref name="phonecard-terms">''Telstra Phonecard: Things you need to know'', Telstra, [https://www.telstra.com.au/content/dam/tcom/personal/home-phone/pdf/phonecard-terms.pdf](https://www.telstra.com.au/content/dam/tcom/personal/home-phone/pdf/phonecard-terms.pdf). Accessed 3 May 2026.</ref> This matches the one-way counter design: a spent Smart Phonecard is not normally reset or topped up.
It has been observed recently expired phonecards (e.g. 2025) continue to work. It is possible Telstra has stopped invalidating these cards so that unsold stock can continue to be sold, given the extremely low sales volumes now that the vast majority of calls are free. Please note this is not officially documented, so agents should purchase these cards at their own risk.


== Finding a phonecard ==
== Finding a phonecard ==
Telstra Shop staff may not know what a Telstra Phonecard is, especially because they are now rarely requested. When asking for one, avoid only saying ''calling card'', as staff may think of mobile recharge vouchers, international PIN cards or discontinued products. Useful wording:<blockquote>I’m after a '''Telstra Phonecard calling card''' for use in Telstra payphones. Telstra’s website lists it under '''Calling cards''' and says it is available in '''$5, $10 and $20''' denominations at selected Telstra Stores and retail outlets.</blockquote>It may help to show staff Telstra's ''Calling cards'' page, which states that Telstra Phonecards are used for international, mobile satellite and other chargeable calls from Telstra payphones.<ref name="telstra-phonecard-page2">''Calling cards'', Telstra, [https://www.telstra.com.au/phone-line/calling-cards](https://www.telstra.com.au/phone-line/calling-cards). Accessed 3 May 2026.</ref> Ask whether the store can check old stock, the accessories drawer, or internal product listings.
Telstra Shop staff may not know what a Telstra Phonecard is, especially because they are now rarely requested. When asking for one, avoid only saying ''calling card'', as staff may think of mobile recharge vouchers, international PIN cards or discontinued products. Useful wording:<blockquote>I’m after a '''Telstra Phonecard calling card''' for use in Telstra payphones. Telstra’s website lists it under '''Calling cards''' and says it is available in '''$5, $10 and $20''' denominations at selected Telstra Stores and retail outlets.</blockquote>It may help to show staff Telstra's ''Calling cards'' page, which states that Telstra Phonecards are used for international, mobile satellite and other chargeable calls from Telstra payphones.<ref name="telstra-phonecard-page2">''Calling cards'', Telstra, [https://www.telstra.com.au/phone-line/calling-cards](https://www.telstra.com.au/phone-line/calling-cards). Accessed 3 May 2026.</ref> Ask whether the store can check old stock, the accessories drawer, or internal product listings.


== Expiry ==
=== Recent Observations ===
Telstra's Phonecard terms state that Phonecards end on the date shown on the back of the card or when the stored value reaches zero, and that Telstra does not promise that a card will work after its end date.<ref name="phonecard-terms2">''Telstra Phonecard: Things you need to know'', Telstra, [https://www.telstra.com.au/content/dam/tcom/personal/home-phone/pdf/phonecard-terms.pdf](https://www.telstra.com.au/content/dam/tcom/personal/home-phone/pdf/phonecard-terms.pdf). Accessed 3 May 2026.</ref>
The following table shows stores where agents on the [[Discord Server|Payphone Tag Discord]] have recently tried to obtain phonecards:
{| class="wikitable sortable"
!Store
!State
!$5
!$10
!$20
!Date
|-
|Burwood
|NSW
|Y
|Y
|Y
|2026-06-02
|-
|Chatswood Chase
|NSW
|Y
|Y
|Y
|2026-06-06
|-
|<s>Chatswood</s>
|NSW
|N
|N
|N
|2026-06-01
|-
|<s>Kempsey</s>
|NSW
|N
|N
|N
|2026-05-25
|-
|Marrickville Metro
|NSW
|Y
|Y
|Y
|2026-06-01
|-
|<s>Macquarie Centre</s>
|NSW
|N
|N
|N
|2026-06-07
|-
|Pitt Street
|NSW
|N
|Y
|Y
|2026-05-24
|-
|<s>Rhodes</s>
|NSW
|N
|N
|N
|2026-05-25
|-
|Wollongong
|NSW
|Y
|Y
|N
|2026-05-15
|-
|<s>World Square</s>
|NSW
|N
|N
|N
|Unknown
|-
|Brunswick
|VIC
|Y
|N
|N
|2026-05-22
|-
|<s>Melbourne Icon</s>
|VIC
|N
|N
|N
|2026-06-06
|-
|Melbourne Emporium
|VIC
|N
|N
|N
|2026-05-06
|-
|Rundle Mall
|SA
|N
|Y
|Y
|2026-05-08
|-
|<s>Claremont</s>
|WA
|N
|N
|N
|2026-06-06
|-
|<s>Perth</s>
|WA
|N
|N
|N
|2026-06-06
|-
|Eaton Fair
|WA
|Y
|Y
|Y
|2026-06-12
|-
|<s>Bunbury Forum</s>
|WA
|N
|N
|N
|2026-06-12
|}


Payphonetag players have observed that some recently issued Phonecards with a 2025 expiry date continue to function after the printed expiry date. Telstra Shop staff at Telstra's flagship Sydney store in Pitt Street Mall have also reportedly advised purchasers that these cards will continue to work after expiry. This should be treated as staff advice and field observation only, not a formal Telstra guarantee.
== Exchange ==
In certain cases, phonecards can be exchanged for a new one by posting it to Telstra with a completed form:


Anyone buying an expired or near-expired Phonecard should ask for a receipt and test the card as soon as practical after purchase. If the card does not work, the receipt will be useful when returning to the store or seeking assistance.
* Exchange magstripe for chip card (ended 3 May 2010)
* Exchange expired card with value remaining for new card (except where marked otherwise on card)
* Exchange faulty card for new card
* Exchange card where value was deducted incorrected due to a payphone fault

Latest revision as of 05:47, 13 June 2026

$5 Telstra Phonecard[1]

A Telstra Phonecard (also called a calling card) is a pre-paid card that is used to make phone calls at payphones to international numbers and satellite phones. These cards are sold in denominations of $5, $10, and $20 at select Telstra outlets[2], and they are the only way to pay for such calls, as cash payments were discontinued at some point after domestic calls were made free in 2021. Phonecards can be programmed to autodial a number, which can be useful for agents as it allows making captures on payphones with damaged keypads.

$10 Telstra Phonecard[3]

History

Telstra started issuing phonecards in late 1980s. This first generation of cards were made by Japanese company Anritsu and had the value encoded onto a magnetic stripe, which would be decremented by the payphone. The phone would also punch holes into the card to provide a visual indication of the remaining credit.

In 1997, with the introduction of the Telstra Smart Payphone, a new generation of phonecards with a chip was introduced. As these could not be used with older payphones, Telstra introduced a simple colour code: chip cards carried a red arrow matching the red arrow on Smart Payphones, and the older magstripe cards carried a green arrow matching the green arrow on older payphones.[4] This has since been retired as there are no longer any phones remaining that accept magstripe cards.

Telstra also promoted the Smart Phonecard as a possible stored-value payment system beyond payphones, stating that Smart Phonecards would soon be accepted in vending machines for snacks and drinks.[5] The extent of any later vending-machine rollout is unclear.

Technical details

The chip used in the Telstra Smart Phonecard has been identified by hobbyist and collector testing as the Siemens/Infineon SLE 4436 family. The SLE 4436/36E was specifically designed for prepaid telephone-card applications. Manufacturer information describes it as containing 221 bits of EEPROM memory, 16 bits of ROM, a control/security unit, and a computing unit for chip authentication.[6]

The chip stores the card serial number, the remaining value on the card, an autodial number of up to 10 digits and certain other data. For security reasons, the chip is programmed to only allow one way writing. Credit cannot be added, it can only be deducted, hence why it is required to exchange the card for a new one if a refund is required. Similarly once an autodial number has been set, it cannot be edited or removed.

Ranges of serial numbers to invalidate can be sent to payphones in case a batch of phonecards is lost or stolen. This is likely also how cards are invalidated when expired.

It has been observed recently expired phonecards (e.g. 2025) continue to work. It is possible Telstra has stopped invalidating these cards so that unsold stock can continue to be sold, given the extremely low sales volumes now that the vast majority of calls are free. Please note this is not officially documented, so agents should purchase these cards at their own risk.

Finding a phonecard

Telstra Shop staff may not know what a Telstra Phonecard is, especially because they are now rarely requested. When asking for one, avoid only saying calling card, as staff may think of mobile recharge vouchers, international PIN cards or discontinued products. Useful wording:

I’m after a Telstra Phonecard calling card for use in Telstra payphones. Telstra’s website lists it under Calling cards and says it is available in $5, $10 and $20 denominations at selected Telstra Stores and retail outlets.

It may help to show staff Telstra's Calling cards page, which states that Telstra Phonecards are used for international, mobile satellite and other chargeable calls from Telstra payphones.[7] Ask whether the store can check old stock, the accessories drawer, or internal product listings.

Recent Observations

The following table shows stores where agents on the Payphone Tag Discord have recently tried to obtain phonecards:

Store State $5 $10 $20 Date
Burwood NSW Y Y Y 2026-06-02
Chatswood Chase NSW Y Y Y 2026-06-06
Chatswood NSW N N N 2026-06-01
Kempsey NSW N N N 2026-05-25
Marrickville Metro NSW Y Y Y 2026-06-01
Macquarie Centre NSW N N N 2026-06-07
Pitt Street NSW N Y Y 2026-05-24
Rhodes NSW N N N 2026-05-25
Wollongong NSW Y Y N 2026-05-15
World Square NSW N N N Unknown
Brunswick VIC Y N N 2026-05-22
Melbourne Icon VIC N N N 2026-06-06
Melbourne Emporium VIC N N N 2026-05-06
Rundle Mall SA N Y Y 2026-05-08
Claremont WA N N N 2026-06-06
Perth WA N N N 2026-06-06
Eaton Fair WA Y Y Y 2026-06-12
Bunbury Forum WA N N N 2026-06-12

Exchange

In certain cases, phonecards can be exchanged for a new one by posting it to Telstra with a completed form:

  • Exchange magstripe for chip card (ended 3 May 2010)
  • Exchange expired card with value remaining for new card (except where marked otherwise on card)
  • Exchange faulty card for new card
  • Exchange card where value was deducted incorrected due to a payphone fault
  1. ↑ https://www.ebay.com.au/itm/396077653712
  2. ↑ Calling cards, Telstra, [1](https://www.telstra.com.au/phone-line/calling-cards). Accessed 3 May 2026.
  3. ↑ https://www.ebay.com.au/itm/396077695502
  4. ↑ Using our new Smart Payphones and Smart Phonecards is easy, Telstra advertisement, The Sydney Morning Herald, Fairfax Media clipping via Newspapers.com, [2](https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/). Accessed 3 May 2026.
  5. ↑ Using our new Smart Payphones and Smart Phonecards is easy, Telstra advertisement, The Sydney Morning Herald, Fairfax Media clipping via Newspapers.com, [3](https://fairfaxmedia.newspapers.com/article/the-sydney-morning-herald-telstra-smart/196788410/). Accessed 3 May 2026.
  6. ↑ SLE 4436/36E Short Product Information, Infineon Technologies, [4](https://cardplus.ru/wp-content/themes/new_templete/files/sle4436.pdf). Accessed 3 May 2026.
  7. ↑ Calling cards, Telstra, [5](https://www.telstra.com.au/phone-line/calling-cards). Accessed 3 May 2026.
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