After updating iOS-8- mobile does not works in 2G area it turns off. It is only compatible to 3G and 4G. is there any app or configuration that can roll back the update to previous or sort out the issue.
Yes IOS 8 doesnt having 2G option it automatically picks up 3G but this issue hasbeen resolved in the newer version 8.1 IOS which was launched on Monday ,2days back proly they have given back the 2G ,3G and LTE option and I have updated my iphone and got back that option plus it has fixed alot of wifi bugs and other bluetooth onea too.. upgrade it to the lastest 8.1 IOS.Ive got 5s
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