To unlock a device your carrier may charge an unlocking fee. This will depend on carrier to carrier and device to device. You should call your carrier to confirm the charges.

Note: If your device is network locked, this means that your device cannot accept any SIM that is not your current carriers. Your Global SIM will not work in a locked phone.

Please contact your carrier directly and they will be able to assist you with unlocking your device. You will most likely be asked to provide an IMEI number, which can be obtained by dialling * # 0 6 # on your mobile. 


If you are with Telstra, please contact the Telstra Unlocking Centre at 1300 720 179, or call 125 8880 and follow the prompts.

If you are with Optus, please click here.

Customers with iPhone, please call 1300 075 395 and follow the instructions.

If you are with Vodafone, please click here or call Vodafone Customer Support on 1300 650 410.

Please note that your carrier may charge a fee for unlocking your handset and the unlocking time can vary. It is best to check if your phone is unlocked prior to your departure to avoid issues overseas. 

Once you have inserted your Lingmo Travel SIM, if you do not pick up a carrier after several minutes, your mobile device may be network locked. Please call your carrier to unlock the mobile device.

Alternatively, if your mobile device displays any of the following messages, your phone may be locked:
- Network locked
- No SIM inserted
- SOS only
- Activation Required
- Select a Wi-Fi Network

Please call your carrier to unlock your mobile device.

If you have an iPhone, your mobile is most likely locked. You can check this by going to Settings > Phone > Scroll to bottom. If the last thing displayed on your Phone Settings is a carrier name, it is locked to that network.

Many carriers all over the world will network lock iPhones.


Step 1: You will need to contact your carrier to unlock your device. You can usually call them or request your device unlock online. 

You will need an identification number for your phone, called the IMEI, which can be obtained by dialling *#06#


Step 2: Backup and restore on iTunes.

After unlocking it with your carrier, please perform a Backup and Restore for your phone on iTunes. For the unlocking process to be complete, this step must be done. Please ensure that you have a SIM that is different from your original carrier inserted, connect the iPhone to iTunes, click on “Backup this iPhone”, and then “Restore iPhone”.

Once both steps have been done, you will receive a notification from iTunes "Congratulations, your phone has been unlocked"


Step 3: Restart your device by holding the home button and top lock button at the same time until the Apple logo appears. This will restart your device and when it is switched back on your iPhone should now be unlocked. 

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 Free call from Lingmo Travel SIM

Quick tips

 Data Roaming

Can't set up mobile data?

Insert the Lingmo Travel SIM into your phone and dial *172# You will receive an SMS - click on the link in the message to install the data profile.

Alternatively, go to your device’s Settings and create an Access Point Name with globaldata entered into the Name and APN fields.

Download our SIM Quick Start Guide for more information.


Can't make phone calls?

Use the full international number format starting with + Example: To call or SMS the Australian number 0401 555 555, dial +61 401 555 555

If you still experience issues, try the format *61 401 555 555#

Your phone will hang up and then call you back. Answer the call back and you will be connected.

 Network Connection

Can't connect to a network?

Your SIM will auto connect to a supported network. If you experience issues, go into your device’s Settings and manually select a network to connect.

On Apple devices, please go to Settings > Service Provider. You must switch Automatic off to manually select a network.

Settings on Android devices vary, however it is often located under Settings > Mobile Networks > Network Operators

You must enable Data Roaming in your device's Settings to use data overseas

Make a test call on your Lingmo Travel SIM by dialing *222# before you depart

Visit our Rates page to check supported networks at your travel destinations