Unlocking your Motorola A3100 for free requires a Motorola unlock code. An unlocked Motorola A3100 will work on any GSM phone network you pick. Before you can get your Motorola A3100′s unlocking code you will need to know it’s IMEI number. You can find the IMEI number by typing *#06# or reading this phone guide. Once you have acquired your A3100′s IMEI number you can work on getting the free unlock code.
Getting a free unlock code for your Motorola A3100 is probably going to be the hardest part. My first suggestion is to call up your phone carrier and request one. I have heard of success with both AT&T as well as T-Mobile. If you cannot get a free unlocking code for your A3100 this way, then you should search Google for free Motorola unlocking software or unlock code calculators.
Once you have your Motorola A3100′s unlock code, use the steps I have posted below to unlock your mobile phone. Warning: Entering in 3 or more incorrect unlock codes could permanently lock your Motorola A3100 phone!
How To Unlock Motorola A3100
1. Reboot your phone with an unaccepted SIM card in.
*If the display reads “Enter Special Code”, enter the unlock code and press “OK”
*If the display does not read “Enter Special code”:
2. Press and hold the * key until an entry box is displayed.
3. Type *, #, 3, 2, # and press “OK”
4. Enter your Motorola unlock code and press “OK.”
5. Your Motorola phone should now display either “Completed” or “Deleted”
Now enjoy your fully unlocked Motorola A3100. You can probably also try the steps above without putting any SIM card in if you haven’t purchased a new SIM card for your phone yet.