so i didn’t read all the replies and I have had this issue with both Android and Iphone most recently the Iphone12 pro max(1 year old) and then android is technically last one a S7 plus tab phone was S22plus. Are you all switching off your Wifi buttons when not on your or a known wifi network? Because as my ex the programmer explained that the phones will always try to first find a wifi signal then use data. So if always “on”but not connected then you are basically throttling your own signal as well as burning through your battery faster. The dead “spots” are the line between moblie data and wifi trying to kick in. Some may already know this, some may not but next time it happens just turn off wifi and wait a few moments to see what happens, possibly reset the phone ot your network by going full airplane mode. But 9/10 this is why for me the other 1/10 is Iphone or Android needs an update. Both systems if its blue in the control panel, its on, whether you are connected or not. To turn
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