iPhone 8 lte switching problem

[inwoker]

It goes something like this:
I make a call or take a call, during the call - phone switches to 3G. After call, it switches back to LTE and falls to 1 reception point. After 5 seconds or so - it switches to - No service. If I leave phone - it would just be out of service for a long time. If I start a new call - it immediately finds a network. It doesn't happen every time after call, but only in some areas.

If I switch it to 3G only mode - nothing like that happens, phone works totally normal.

This same sim card works fine on my older iphone 5s.

This iphone 8 works fine on LTE with different sim card from different provider.

So, what do you guys think, is it software bug in iOS or faulty phone?

Video is a demo of how it happens:

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photos.app.goo.gl

 

[Reno Raines]

Go to settings, cellular, cellular data options, then voice and data. See what you have checked.

 

[TrueBlou]

If you have 4G, VoLTE On selected in the settings, you may be suffering from the same thing I, and others, are, it’s buggy to say the least.

The phone seems to work much better if you disable VoLTE, sure you’ll drop back to 3G for calls, but it should all work smoothly.

 

[inwoker]

We don't have VoLTE in our country, so it's VoLTE off

 

[macintoshmac]

It seems, in my country and for my carrier, 13.3 beta 1 is definitely performing better, if not optimally. There is a carrier settings update and a firmware update in 13.3 beta 1.

 

[inwoker]

Update 13.2.2 seems to be fixing my problem. Will post after testing it for a day or two.

 

[inwoker]

So far, no connection drops. 13.2.2 fixed it.