... ainternet order 3. GPRS communication mode Customized Portable Wireless GPRS SMS Printers Hardware Instruction Pull to ... W, X, Y, Z, 9* key: special symbol0 key:space, 0# key: switch between letters and numbersDel: delete the ... When GPRS Printer stand by, press Menu key, you can enter into sub-menu.MenuGPRS APNGPRS ... . In the sub-menu, press Menu key once2. Press #key to capital letters. (ABC On the LCD ...