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Mobile data is not working after missed call

I have this strange issue in Sony Xperia U. Currently I am using 6.1.1.B.1.100 bulid ICS 4.0.4. There is no option in mobile network to select 2g or 3g or 2g/3g. All I have is Use only 3g networks in ...
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Is it possible to disable 2g connections completely, while allowing 3/4g connections to continue?

I would like to completely disable all 2g connections, but allow 3g and 4g connections. Is this possible? how would one go about doing such a thing? I see options to disable 3g/4g to "save battery ...
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75 views

Can't make or receive calls in GSM mode on samsung ACE PLUS

A month ago my Samsung ACE Plus started behaving little bit differently in that I can't make calls or receive calls when on 2G (GSM) network. First I thought it was a network problem, but it is not. ...