Make phone call with android phone with google voice

The apps you can use to make free phone call without cell phone services

TalkaTone for android and GV phone.. both can be download on google apps..

Samsung a157

How to unlock AT&T Samsung SGH-A157 for FREE.

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 A157

skip 1 and 2 if want the imei # to be stay..

Step 3: Once the phone restarts, dial #*7337# This will remove sim lock and reset phone

Step 4: Now insert your sim card. and restart the phone.

DONE.