How do I unlock my phone ?

Contact the original carrier who sold you the phone and provide them with the IMEI, they will give you the code to unlock your phone for free. There is no charge for this service even if you are no longer their customer.

If it’s an iPhone, after contacting the original provider, all you do is backup and reset the phone. Sometimes a simple mobile network reset is enough

Go to your previous provider and ask them to unlock it. They may charge you a few bucks.

All phones can be unlocked for free by mobile providers. If it not already, contact the original carrier/mobile provider and they will do it for free when you provide them the IMEI.

I have an iphone that I had to switch over from an American carrier to a Canadian carrier a little over a year. The process was simple and free. I had to call the previous carrier and they unlocked it. It didn't take too long over the phone :)

What is the error? If it is locked, then your current cell phone provider is required by law to unlock it for free.