Solved: Re: Signal drops from 4G to 3G when making or rece...

Dave141 · ‎11-05-2021

I have 2 iPhones on O2, one works perfectly. The other drops from 4G to 3G when making or receiving calls and occasionally the 3G symbol disappears entirely and the phone won't make/receive calls for a few mins.

I've swapped the SIMs over and the problem moves with the SIM. So I got a new SIM and the same happened. So I got a second new SIM and the same has happened again.

This is driving me bonkers - what is the problem?

MI5 · ‎11-05-2021

@Dave141

Yes it is the problem

You need wifi calling aenabled as this also incorporates 4g calling.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.

View solution in original post

Dave141 · ‎11-05-2021

Just found that VoLTE was turned off and not enabled on the SIM contract (it's actually a work business phone) - is this the answer?

MI5 · ‎11-05-2021

@Dave141

Yes it is the problem

You need wifi calling aenabled as this also incorporates 4g calling.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.
Please select the post that helped you best and mark as the solution. This helps other members in resolving their issues faster. Thank you.

O2

Signal drops from 4G to 3G when making or receiving calls

Roaming

Which carrier

Apple Watches bought directly from Apple

Device and air plan

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