I just bought an ipad 3 that us att. I wanted to use my Verizon sim in it because I heard that all ipad are unlocked, but when I put my Verizon sim, it says that the sim is invalid and that I should put the stated carrier sim to activate the ipad. I don't know what else to do because I want to use my Verizon sim on this. Does that error message mean that after activating it with an att sim card, I can then use the Verizon sim on it? Thanks for your answers!
См. статью: Can I use a Verizon sim card on an att ipad?