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Can some one help. My Xperia M which was giving fine 3G connectivity has stopped giving 3G connectivity after AIRTEL switched over to 4G.
I think you need to contact your operator to get that fixed, it could be something wrong with configuration or you might be needing a new SIM card.
There seems to be some frequency issue with the SONY HAndset. If any one has any information kindly update. AIRTEL is saying U900 spectrum on which ARTEL 4G works will not support 3G of SONY XPERIA M DUAL. SONY XPERIA M DUAL Lists these as operating frequency. GSM : 850/900/1800/1900 MHz HSDPA : 900/2100 MHz .