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    Huawei E303s Unlocked USSD not working

    Hello every body, I have recently unlocked my Huawei E303s GSM Modem and i have installed Mobile Partner 21. I have tested USSD and SMS (Send and Receive) which work fine on the Mobile Partner, but when i tried to test USSD on Hyper Terminal with AT COMMANDS i got CME ERROR : 100, how coud i...