... order 3. GPRS communication mode Customized Portable Wireless GPRS SMS Printers Hardware Instruction Pull to open ... registered successfully, GPRS Printer will try to connect server automatically. For the first use, When GPRS Printer ... 3key 2 times, E is okThen, press 8key 1 time, T is okThen, press *, then menu key, ... , get the symbol of.Then, press 1key 1 time, 1 is okThen, press *, then menu key, ...