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weird there is not much info on your phone specifically the j737a. i found info for att with the j727a, but that is not your phone.
is your phone rooted?
not sure what you can do without a firmware update. i'm not very familiar with factory binary. the only thing i saw was that flashing a firmware might fix your problem.....but you have to find one that is specific to your phone which i can't find.
curious as to how your phone got into the binary mode?