well guys i am buying a comet droid from my sister, and it’s tmobile i have straight talk and wanted to use my sims card for it , cause in a iphone i know u can , but can’t find a way to unlock it . i know there are loads of sites online that u can go and unlock it for a fee. but it shows you where to put in a code that your phone will ask, but with this sim card it don’t so i feel it will be a wast of money and time. I am going to switch to t-mobile to buy a sim card online is 6.99 and to get a 4g prepaid plan is 50.00 a month unlimited not to bad only 5.00 more, cause right now i pay 45.00 unlimited everytime though straight talk. but i’m just inlove with this phone. and my inetnet is about to be shut off …so will prob get it back on and running after christmas i’m hoping. money is tight right now .