... accept ainternet order 3. GPRS communication mode Customized Portable Wireless GPRS SMS Printers Hardware Instruction Pull to open the ... . Press 2key 3 times, C is ok;Then, press 6key 1time, M is ok;Then, press 6key 2 times, N ... Press 1key 1 time, 1 is ok;Then, press 9key 1 time, 9 is ok;Then, press 2key 1 time, 2 ... . Press 2key 1 time, 2 is ok;Then, press 3key 1time, 3 is ok;Then, press 4key 1 time, 4 ...