I have a Prepaid Samsung Galaxy J3 Mission, and on the back the amount is $50 in payments received. I used it for 2-3 months at I believe $60 a month, so I am over the amount needed, but I have been told I can not get it unlocked because I no longer have active service. (I bought the phone for use while hunting, because my ATT wireless didn't have service there, and Verizon wireless does not have good service at my house. I didn't realize that I might be able to use the J3 on ATT (thinking GSM/CDMA incompatibility, not realizing that with LTE the technology is merging.) and would like to use the J3 with ATT until we go back up North for hunting. (We hunt for 3 months out of the year and during that time, I need to use Verizon.)
Is there any way to unlock the phone so I can use it this summer, or am I stuck until fall before I can get it unlocked?