I own an Thunderbird i5 LTE (Based on MTK6575) and my 3g data doesn't work anymore only 2G works. When I go to Network Mode in Settings and select WCDMA only it says Restricted access changed and the signal drops. Then I try to search a network operator, it shows Orange 3G, I select it, it says Registering on Orange 3G and after 30-60 seconds "Unable to connect to this network at this time". What can I do to restore the connection? (My phone is rooted)