I can't start my phone
Before you can use a Telstra SIM, you need to unlock your phone using an unlock code. To get the unlock code, contact the operator that locked your phone.
Can you turn on your phone?
It's important to find out if you can turn on your phone. If you can't turn on your phone, you need to solve this problem first. When the problem is solved, you will most likely also be able to start your phone.