Problem with dual sim phone


Manchester United

My wife has a samsung galaxy A7 (2015 model). There is both vodafone and airtel sim cards on the phone. The problem started when we upgraded the airtel sim card to a 4G sim. The vodafone sim is still 3G. The vodafone tower switches off intermittently and becomes not reachable. It only becomes available when we restart the phone. This problem was not arising when both the sim cards were 3G. In the dual sim settings, the setting for smart dual sim (receive calls on the other sim when the 1st one is busy) is not enabled (dual sim - standby mode).

Any suggestions? This should not happen, right? Also we do not want to surrender the airtel connection now nor we would like to buy a new mobile now.


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