I have the same problem, everything is well but it doesn't show it in the map, GPRS OFF, even when the SMS is right (Msg: GPRS123456, and answered GPRS OK!)
ຂ້າພະເຈົ້າມີບັນຫາດຽວກັນ, ທຸກສິ່ງທຸກຢ່າງແມ່ນດີແຕ່ມັນບໍ່ໄດ້ສະແດງໃຫ້ເຫັນໃນແຜນທີ່, GPRS OFF, ເຖິງແມ່ນວ່າໃນເວລາທີ່ SMS ທີ່ເຫມາະສົມ (msg: GPRS123456, ແລະຕອບ GPRS OK!)