Hi! There IS a solution. Sorry for the long video I will attach, but if you have such a connector I'm showing in the video on the inside of your phone (often covered with some sticker so it seems not visible, check it out carefully!!!) than you problem IS SOLVED! Just try it out. Forget posts who say you'll damage you phone, I'm using it with this fix for a year now :) Hope you have this connection, if yes this helps 100%. Wll be even better than a new one! (and don't laugh, I'm not a native English and speak slow...)
HI you can purchase network unlock code for your Huawei Y300 ascend mobile from sites like SimpleUnlocking.com for affordable cost .You first check that whether the code is available for your country and network provider .If yes then pay for it and unlock your mobile then freely use it with any GSM sim ..