... , r, s, P, Q, R, S, 78 key:t, u, v, T, U, V, 89 key:w, x, y, z, W, ... transmission, suggest prohibiting all voice and SMS functions in this SIM card)2. Install GSM antenna3. Connect power ... (default password: 123456)In the menu, you can make some settings through keyboard on GPRS Printer. When ... GPRS Printer stand by, press Menu key, you can enter into sub-menu.MenuGPRS APNGPRS IPGPRSPortGPRS User NameGPRS ...