How long am I going to wait ?
The waiting time for receiving an unlock code for Acer phones starts from 24 minutes to 48 hours.
Unlocking instruction for Acer M310 ?
How to enter an unlock code in an Acer M310:
1. Turn on Acer M310 with an unaccepted sim card inserted (from a different network)
2. enter the unlock code provided by sim-unlock.net
Your Acer M310 is now unlocked.