I bought a Optimus G to use overseas when I travel, I have an Iphone. I lentthephoneto a friend whowentto Europe so he could test itand hesaid itasked for a code,he didn't knewwhat to doand messed around with the phone. Now thephonesays it ispermanentlyblocked, does thismean thatnowI can'tuse it overseas? Can AT&T fix this? Please help!