... , W, X, Y, Z, 9* key: special symbol0 key:space, 0# key: switch between letters and numbersDel: delete the last letter ... )2. Install GSM antenna3. Connect power adapter4. Switch on GPRS Printer begins to initialize… It will ... . When GPRS Printer stand by, press Menu key, you can enter into sub-menu.MenuGPRS APNGPRS ... 1. In the sub-menu, press Menu key once2. Press #key to capital letters. (ABC On the LCD, ...