Is the straight talk iphone unlocked?

My sister is buying me a iphone for my birthday (i preferably want the iphone5), but my parents are switching to tmobile prepaid (tmobile doesn't have iphones. ) and i just wanted to know if i could put the straight talk iphone on tmobile. I know how to place the tmobile sim card in straight talk iphone i just want to know if the iphone will accept it.

No you will have to use the Iphone with Straight Talk service. Since Straight Talk is selling the Iphone at a discount, they do not have to unlock their phones to be used with a different provider.

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