Okay I need a lot of help. Last christmas I bought my mom a used iphone 3g which was on the fido network (canada.) My moms on the telus network, so naturally I had to jailbreak and unlock the phone for her. Everything went fine until she lost her sim card tray a month ago. I ordered a replacement one for her on amazon (this one) http://www.amazon.com/Black-Holder-iPhone-Compatible-Eforcity/dp/B001M6AGO6/ref=cm_cr_pr_product_top and it just arrived. When we put her sim card in it, it fits a little loosely and the sim card has space to move around. When I put the sim card in the phone with the new tray, it just says "searching" or "no signal." What can I do to fix it?? During this time I plugged it into my computer to download music and that might have updated it, I'm not sure.