I got a boost mobile samsung galaxy J3 emerge J327P rooted with trwp and supersu. I got the unlock code from boost 832016. I use a app called Shortcut master lite to find Network lock screen because 7465625*638 in dail pad won,t work. I enter the code without a sim card in phone. Its says unlock seccessful. Went to At&t store to switch carries they got my IMEI number and got a sim card from them. Put it in and says invalid sim card. Boost is CDMA and At&t is GSM. Will this work.