Will my Iphone 5sfrom tmobile work with simple mobile?

I have an iphone 5s from tmobile can it work with simple mobile. SOmeone told me I just have to change the AVn seting or something like that, they also said it does not need to be unlock?

The phone needs to be unlocked before you can use the phone on SimpleMobile. If you need help with getting the phone factory unlocked, mail me for references.

Hi, try to contact T-Mobile at first. If you need to use your iphone with other carriers you might need to factory unlock your phone. Either contact T-Mobile to do that for you or try eBay. Another solution would be using the link below. Or if you have a friend working there he might help.