If you are travelling, buy a local SIM card and save on roaming fees, you need to unlock your phone.
In order to unlock your Samsung Galaxy Gio , you must have your IMEI number and a microSIM card from another service provider.
If you want to unlock your Samsung Galaxy Gio for free,Follow these steps:
Dial 8#06# and the Samsung Galaxy Gio IMEI code will appear on screen then record your IMEI number on paper.
Call your service provider’s customer service line and ask customer service for the SIM unlock code for your Samsung Galaxy Gio.
Once you receive your SIM unlock code from your service provider, turn off your Samsung Galaxy Gio
Remove the microSIM card from the phone
Insert a microSIM card from another service provider and turn the Samsung Galaxy Gio back on
When prompted, enter the SIM unlock code sent to you by your service provider
Enjoy your Samsung Galaxy Gio on any GSM carrier of your choice.
Of course, if you can not get IMEI number from the customer service,you can go to http://www.htcsimunlock.com/#oid=1141_1 for help.
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