Why didn't Gionee Tian Jian w909 receive the short message?

Hello, can you confirm whether the local network signal environment is stable? If you can't receive any information except external environmental factors and mobile phone arrears, I suggest you check whether all information has been intercepted because of adding a black and white list, or try to change a SIM card. If it is still abnormal, try to restore the factory settings by backing up the fuselage data.