If you're a former Nextel customer who wants to use your phone with a new wireless provider, you first have to unlock the device. Some websites charge a fee for providing unlock codes, but there's no guarantee they're going to work. It's best to just contact Nextel customer service and ask for the unlock code. Nextel typically provides unlock codes to customers in good standing, those who have completed their service agreement or for those who want to use their cell phone for international travel.
Contact Nextel at 800-639-6111 for the unlock code for your phone. It is best to call from a phone other than the phone you wish to unlock.
Determine your phone’s make and model by removing the battery cover and battery. That information is often written on the label beneath the battery.
Copy and paste the following URL into your browser’s address bar: http://www.mobileunlockguide.com/mug/. You can go to this website if your service provider will not provide the steps for unlocking your phone.
Select the manufacturer name and model number for your Nextel phone.
Click “Get Instructions.”
Follow the steps to unlock your device.