Unlock your Cingular phone for use on the T-Mobile network.
Although mobile phone providers brand and lock cell phones for exclusive use on their networks, you can obtain unlock codes and use the same phone on a different network. For example, if you have a Cingular cell phone but want to use it on the T-Mobile network, you need to obtain an unlock code, insert the T-Mobile SIM card, and unlock the phone by entering the unlock code. The Cingular network is now known as AT&T Wireless.
Instructions
1. Locate and write down your phone's IMEI number by pressing *#06# on the device. You will need the number to obtain your unlock code.
2. Request the unlock code from AT&T Wireless (formerly Cingular). The customer service number is 1-800-331-0500. Your account must have been active for 90 days for contract users and six months for prepaid users. Prepaid users can also submit a proof of purchase to obtain the code. If you can't get the code from AT&T Wireless, you will have to purchase the code from an online unlock service.
3. Remove the SIM card from the Cingular phone. Insert the T-Mobile SIM card into the Cingular phone. Turn on the phone. Enter the unlock code when prompted. The phone will unlock and connect to the T-Mobile network.
Tags: unlock code, Cingular phone, code from, T-Mobile network, code from Wireless, from Wireless
