Acer phones can be unlocked by a code. After unlock you can use it worldwide. It is the safest and fastest method. This unlocking service is independent from the network. It is 100% secured. If the device asks for an unlock code it can be unlocked easily.
Unlocking instructions for Acer
How to enter an unlock code on an Acer Phone?
1. Turn on Acer with a different network sim card.
2. Enter the unlock code provided by cellcute.com.
Now your Acer is unlocked.