I have a 6 with sprint with thats my career and just got an iPhone 6 Plus and it’s witg T mobike and trying to unlock it so i can switch it to sprint.
TMobile would need to unlock it for you.
https://support.apple.com/en-us/HT201328
Just keep in mind that since Sprint and T-Mobile use different network technologies, this may not be possible as your phone's hardware may not support the spring network. Also Sprint doesn't support VoLTE or the ability to be on a call and surf the web at the same time. Not something they advertise but an important limitation to be aware of going in.
I have a iPhone 6 Plus with t mobile and trying to switch it career with sprint. How would i do that?
