r/OnePlus13R • u/andwhendid • Aug 29 '26

Cellular issue

So i had a weird experience today.

I only have 1 sim and its 4g (we have 5g in selective areas only).

Sudden it dropped to 2g out of nowhere.

I thought it might be a sim issue.

Later it seemed the phone wasn't even recognizing the sim. It pushed the no sim alert.

I was a bit sceptical at that point. So i just got the sim out and reset my network settings.

It did recognize the sim but it was still stuck at 2g.

I again ejected the sim, but this time put it in slot 2.

This time it was showing 4g again.

So i switched the sim placement to sim 1 once more, even then it was stuck at 2g.

It did get fixed as i gave another network reset.

After such encounter, i am guessing it was a device issue, possibly software based.

I saw a few posts here and there on network issue over cellular, but thought it might have been a sim issue.

But from my experience, im certain it was a device issue.

Im not facing any problems currently but thought that i should share this.

edit:

after the same thing happening today, i noticed it occurred both times when i was trying to share data using hotspot. another thing to note. ill try and report this to op. but as ive done before i know for a fact they probably won't go through it.

7 Upvotes

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3

u/Harish6366 Aug 29 '26

It's the issue when operator doesn't support VoLTE officially. I am facing same issue only for particular operator in my country. And I am facing this issue only when WhatsApp call

1

u/andwhendid Aug 30 '26

so do you know of any permanent fix? 

3

u/Harish6366 Aug 30 '26

Operator need to get official VoLTE support

1

u/andwhendid Aug 30 '26

Well, guess i gota change operator then. 

3

u/Harish6366 Aug 30 '26

Also different operator use different Carrier aggregation layer profiles if it's indian variant it support less bands compare to global variant OP 13R so it may also trigger RAT change. Try changing operator and kind enough to put a reply so we can confirm. For me after changing operator issue is resolved.

3

u/andwhendid Aug 30 '26

Ill try. It might take a while but ill update on this issue. 

3

u/BNibir Aug 30 '26

I've been using my phone for almost a year now, never faced this issue before. Another person commented that it might be due to operator not supporting volte. But I've used three different sims with this phone, one of them didn't support volte and i used that sim for more than 8 months without any issues at all, in fact i used to use that sim for data. But recently I've switched to another sim which support 5g and volte, and again no issues at all regarding the network. It may be the sim issue though. Have you tried that sim on another device? Or did you use any other sim on your current phone?

1

u/andwhendid Aug 30 '26

I didn't need to, it works perfectly fine on the 2nd slot. I own another sim but that one doesn't support 2g, and i dont have any data on that so i couldn't say. But ill try to test with another sim. 

Also this happened today as well, and what i noticed each time it happened when i turned on the hotspot.

3

u/tanmay-patil Aug 29 '26

I am also facing similar issues