Can I unlock an iPhone after using it only for a couple months?

I want to buy an iPhone, but I'm not sure about it. I got a job offer abroad and I will have to move out in three months, therefore I want to buy an iPhone with a plan (since it's cheaper) and then later, I would unlock it so I could use it with a chip from where I'm going.

So do you guys know if I can buy a T-Mobile, Verizon or whatever iPhone, use it only for a couple of months here with the plan, just to have it unlocked later?

Yes you can unlock an iPhone no matter how many times it has been used before.

You can basically buy a A&TT phone, get a plan with t-mobile, go online, pay for a unlock key code, after you pay for it, they will email you the directions on what to do, after you do all that, you can insert your t-mobile sim card, into your A&TT phone, i hope i answered your question right

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