Sir, I am facing serious problem. I can't change network settings about 2G and 3G mode because Network mode is not opening in my karbonn smart a 26 mobile phone. There is whole lot of issue with it because its set in 3G mode and now when there is no 3G available , there are no signals in my phone even though there is 2G available in that area. Now I can't make call and have to find 3G signals to make calls. This is making my phone useless.
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