Apple India — Regarding network issue in iphone

Address: Haridwar, Uttarakhand, +91

Many times when network signal weak almost no signal then in my i phone no signal will come during whole day .i am facing this issue many times .
when network do not come whole day again we have to switch off the iphone and again restart till signal do not come.

I have already communicated with the apple team and all activity i have done as suggest by me like update the latest version etc but right now i am facing same issue .

So request you to please look into the matter.