Can I use a Straight Talk iPhone SE on T-Mobile?

[AC Question]

Walmart forces you to activate their iPhones or to have a Straight Talk SIM card already. So I would need to buy the iPhone, buy one month, and have it activated. Does this lock the phone to Straight Talk or will it accept my T-Mobile SIM card? I want one for T-Mobile and this is the cheapest way to get a brand new one.

 

[chanchan05]

Maybe people who actually use iPhones would know more (this is an Android forum. You know, Samsung Galaxies, HTCs, LG, etc). Check out their forums on the URL posted below:

https://forums.imore.com

 

[belodion]

Yes. I know that here in the U.K., iPhones bought from most retailers will lock to the carrier whose SIM you first use. To get a permanently unlocked one, you need to buy from Apple, or one or two particular retailers. I don't know why it is so, but it's a pesky nuisance.