Hi guys. So I purchased an iPhone 6s about a week ago, but it's the locked version, which is locked to T-Mobile currently. This was the first time I ever purchased a locked phone, so I'm curious after how long can I request the phone to be unlocked ? And would I have to request Apple to do it, or T-Mobile ? I saw on ModMyi that unlocked iPhone 6s's can now be purchased too, so I guess I'm trying to see if I should continue using my existing locked iPhone 6s, or exchange it for an unlocked one.