or for free by calling att
not on dumbphones (IME at least)
Ordered 5, got them today, and Unlocked directly by calling at&t.
How to Network unlock AT&T GoPhone Samsung A157Posted by Manikandan Ramakrishnan at 02:52 I recently came to USA and had brought two Indian phones with me, but could not get any reception here in US for Airtel. I had heard that Airtel had ties with TMobile in US and that I was supposed to get network here. So, I dug around and found that the network was in a different band and could not be joined by both my Nokia and Samsung c3303.Luckily, I had an AT&T goPhone lying around after I bought Samsung Galaxy S3, but it was locked to AT&T alone. I tried to insert my airtel sim, but it asked for Network lock pin.After searching for a solution for a long time, I finally found the solution from here.SGH-A157 Network unlock procedure:==============================Step 1: Remove sim card from phone and turn the phone on.Step 2: Dial *2767*3855# This will initiate a Full reset for Samsung A157Step 3: Once the phone restarts, dial #*7337# This will remove sim lock and freezeStep 4: Now insert Airtel Sim card. and restart the phone. You will get TMobile signal and will start receiving messages.Update:The above procedure would make the imei number all 0s in the phone. May be because of this, I was not able to use this phone in India with the same airtel sim card.However, my AT&T sim card works fine in the US, and I have even called customer care to associate this phone to my sim card permanently. One thing to note is that AT&T will not accept 0000 as imei number. So, I provided the IMEI number printed below the battery in the back of the phone, and everything works fine now.That's it! Enjoy!
Just turn on the phone without sim card, then type the folowing#*7337# = EEPROM Reset (Unlock and Resets Wap Settings) this will unlock your phone. then u type *#7465625# to check and see then it should display network lock off...then turn off your phone and insert sim card it should work.
If anyone bought, and doesn't need/ has extra I will buy it off them.
