A. Please confirm that the tablet is turning off when SIM card was put in.
B. Input “*#06#” on dialer interface and get IMEI number, then confirm whether it is adapt to the local operator. If it cannot be used, please visit http://www.wintouch.ae download modify tools.
C. Our tablets support 3G. WCDMA just include the 850/2100. And special one can support CDMA.