By
Joseph Hanlon - Editorial Director
Last updated

Unlocking your Telstra phone can open the door to a world of flexibility and savings, if you know how to shop around for a bargain.

If you’re a Telstra customer, getting an unlock should be easy, but it may not be free; read on for everything you need to know about unlocking your smartphone. 

Unlocking on Telstra: postpaid and prepaid 


These days, the only Telstra smartphones which should need unlocking are prepaid devices. If you've bought a phone on a contract any time in the last couple of years, it should be unlocked out of the box. 

Prepaid phones are a bit different. Telcos typically sell these phones with significant discounts, but will lock them to their network. If you buy a prepaid handset from an Aussie telco, you won't be able to use it on a competitor's network until you unlock it. 

Step-by-step guide to unlock Telstra phones
  1. Retrieve the International Mobile Station Equipment Identity (IMEI) number from your phone.
  2. Call Telstra.
  3. Pay your unlock fee using your prepaid credit or your credit card.
  4. Wait up to 72 hours for the unlock to take effect.
  5. When you pay your unlock fee you may get a network unlock code, once you put your new SIM card in your unlocked phone you may be prompted to enter this unlock code.

Where to find your IMEI number      


Before you do anything, you will need to know the International Mobile Station Equipment Identity (IMEI) number for your phone. This is a unique code specific to your phone, and you can find it on the box your phone came in or by calling:

*#06# (star - hash - zero - six - hash) from your handset.

When you make the call you should see your IMEI and serial numbers appear on the screen. Write down the IMEI number you see on screen - It should be about 17 digits long.

How to unlock a Telstra Phone


When you have your IMEI you are ready to unlock your phone. Simply call Telstra:

  • From a Telstra phone - 125 8887
  • From a non-Telstra phone - 13 22 00
  • From overseas - +61 439 125 888 (international charges apply)

The operator will talk you through the process, and at the end, you will be asked to nominate how to pay the unlocking fee. You have the option to use your prepaid credit or to pay via credit card. The cost is determined by how long you've had the phone for.

  • Less than 6 months - $80
  • More than 6 months, but less than 2 years - $25
  • More than 2 years - Free

Once you've paid your fee you may receive a network unlock code (although in some cases this step might be skipped). Note down the code - when you insert your new SIM you may be prompted to enter your network unlock code in order to free the device from Telstra.

How to unlock a Telstra iPhone


If you have bought an iPhone on prepaid plan or an older iPhone (iPhone 4s or older) on a postpaid plan back in the day, the process is basically the same, but it takes a bit longer. Follow the process above, and wait until you receive instructions from Apple.

There is a shortcut to discovering your IMEI number on an iPhone though. Simply go to Settings > General > About, then scroll down to the IMEI entry on the page.

Why unlock your Telstra phone?


The main reason to unlock a phone is you want to change providers. Unlock your Telstra phone, and you're free to take it to Optus, Vodafone, amaysim, or basically any telco that offers SIM-only / BYO phone plans. If you're not ready to pay for a brand new device, unlocking your handset means you can switch plans and still keep the phone you own and love. 

For instance, if you love the strong coverage your Telstra plan provides, but want to cut down on your monthly mobile spending, there are several smaller providers (Mobile Virtual Network Operators, or MVNOs) who use Telstra's 3G and 4G networks. 

The good news? Taking your phone to one of the below telcos means you'll likely save hundreds of dollars every year in mobile plan costs. The downside is that these plans don't offer service on Telstra's ultra-fast 4GX network, but standard 4G coverage is readily available (and definitely fast enough for most of your mobile use). For a sense of your options, check out the widget below for a snapshot of the most popular SIM-only mobile plans under $30 that use the Telstra network.

#1
Tangerine Telecom
Tangerine Telecom
15GB 5G Mobile SIM
  • 15GB data at download speeds up to 150Mbps
  • Deal: Bundle your mobile and nbn plans on the same account to get 10% off your mobile SIM-only plan fees. T&Cs apply.
$30.00/mth
Min. cost $30
#2
ALDI mobile
ALDI mobile
$28 Mobile Plan
  • 12GB data at download speeds up to 150Mbps
$28.00
Per 30 Day Renewal
Link not supplied
#3
Boost Mobile
Boost Mobile
$28 Prepaid
  • 8GB data at download speeds up to 150Mbps
$28.00
Per 28 Day Renewal
#4
Superloop
Superloop
SuperSim Saver 5G Plan
  • 15GB data at download speeds up to 150Mbps
  • Deal: FREE 2nd recharge for existing Superloop broadband customers or new customers signing up for a mobile & broadband service
$30.00
Per 30 Day Renewal
#5
EZEE Mobile
EZEE Mobile
EZEE Starter Plan
  • 15GB data at download speeds up to 150Mbps
$29.00
Per 30 Day Renewal
Link not supplied

If you're looking to save even more, you'll find great value plans from smaller providers using Optus and Vodafone's networks. These include known and trusted brands such as amaysim, Vaya, Dodo, Lebara, Coles Mobile, and more. 

For a sense of your options, check out the widget below for a snapshot of the most popular SIM-only mobile plans under $30 that use the Optus and Vodafone networks.

#1
felix mobile
felix mobile
felix Unlimited+ Mobile Plan
  • Unlimited data at download speeds up to 80Mbps
  • Deal: $25/mth for first 6 mths. Reverts to $50/month. Use promo code UNL80. Ends 30.11.26. T&Cs apply
$25.00
Per 1 Month Renewal
#2
Moose Mobile
Moose Mobile
Moose 100GB SIM Only
  • 100GB data at download speeds up to 150Mbps
  • Deal: Get 100GB for $22– Includes $18 off for first 6 months, then reverts to $40. Offer ends 30.06.27
$22.00/mth
Min. cost $22
#3
SpinTel
SpinTel
$29 Mobile Plan
  • 50GB data at download speeds up to 150Mbps
$29.00/mth
Min. cost $29
#4
amaysim
amaysim
UNLIMITED 15GB Plan
  • 15GB data at download speeds up to 150Mbps
  • Deal: Save $19 for first renewal when you sign up by 11.12.26. New online services only.
$30.00
Per 28 Day Renewal
#5
Swoop
Swoop
120GB SIM Only 5G
  • 120GB data at download speeds up to 150Mbps
  • Deal: Includes $10 off for first 6 months - $30/mth for first 6 months then $40/mth after that. Offer ends 30.06.27
$30.00/mth
Min. cost $30
#6
Kogan Mobile
Kogan Mobile
Medium Monthly Plan
  • 60GB data
  • Deal: Get 60GB for $12 (includes $13 off for first month + 20GB bonus data for 3 months), then 40GB for $25 thereafter, valid until 10.11.26
$29.00
Per 30 Day Renewal
#7
Coles Mobile
Coles Mobile
Prepaid $25 for 28 Days
  • 44GB data
  • Deal: Get 44GB for $10 (incl. $15 off first renewal + 22GB bonus data for first 3 recharges). Ends 24.11.26. T&Cs apply.
$25.00
Per 28 Day Renewal
Link not supplied
#8
TPG
TPG
100GB Large Plan
  • 100GB data at download speeds up to 250Mbps
  • Deal: 50% off - $22.50/mth for first 6 months, then $45/mth ongoing. Available until withdrawn. T&Cs apply.
$22.50
Per 1 Month Renewal
Link not supplied
#9
iiNet
iiNet
100GB Large Plan
  • 100GB data at download speeds up to 250Mbps
  • Deal: 50% off - $22.50/mth for first 6 months, then $45/mth ongoing. Available until withdrawn. T&Cs apply.
$22.50
Per 1 Month Renewal
Link not supplied
#10
Lebara Mobile
Lebara Mobile
$25 SIM Plan
  • 25GB data at download speeds up to 150Mbps
  • Deal: Get the $25 SIM for $9 online until 03.12.26. T&Cs apply
$25.00
Per 28 Day Renewal
Link not supplied

Another big plus to unlocking your phone? If you're heading overseas and want to buy a local SIM to save on roaming prices - or plan to buy a travel SIM before you fly - you also need to have an unlocked smartphone. If a phone is locked to a network, it prevents every other SIM card from working, not just ones from local competitors - so unlocking your Telstra device means you can save money on overseas roaming. 

Having problems unlocking a Telstra phone?


If you get stuck at any place in this process, or the whole thing seems too difficult, there's an easy fix. Simply head into a Telstra store, and one of the sales assistants will be able to unlock your phone on the spot. 

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Joseph Hanlon

Editorial Director | X | LinkedIn

Joseph Hanlon
Joe Hanlon has been immersed in mobile phones, plans and the internet for over a decade, having written for publications like CNET, Techradar, Gizmodo and Lifehacker. He steers the editorial ship and makes sure that we are always serving up the most useful guides and recommendations. If you ever bump into Joe on the street, don't be afraid to ask for a phone recommendation. It's embarrassing how much he enjoys talking about this stuff. He also loves listening to podcasts, so feel free to email Joe with recommendations.

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