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Original topic:

Switching from Wifi to Mobile data problems

(Topic created on: 05-10-2020 02:44 PM)
First Poster
Galaxy Note20 Series

In Canada.  On Telus network.  Pre-ordered a 5G s20 Ultra note.  This is an upgrade from a Note8.  This phone feels like the biggest lemon on the planet.


Due to covid.. I have been working from home mostly.  But in the past 2 weeks I have begun driving more and have noticed a serious problem with this phone.  It seems that as soon as I leave my home wifi the phone has difficulty changing over to mobile data automatically.  SMS won't work (will receive, but cannot send) and internet data doesn't work.


The only fix is to re-boot the phone and then the phone starts working again.


But then, as soon as I get back home I have a similar problem.  It will hop back on my wifi no problems.  Internet works fine through my wifi but my SMS messaging stops again.  I have to re-boot the phone yet again.


This problem is absolutely maddening.  Samsung Canada has been completely useless.  Impossible to get anyone on the phone and they simply pass you around for hours on hold.


I have performed a factory reset now twice... through the software and also through the recovery boot option.  Same issues persist.


Trying to trouble shoot this myself... it seems it may have something to do with either VoLTE and/or perhaps the 5G/LTE settings... auto connect option.  Toggling off VoLTE seems to temporarily fixed the problem for a week.  But I noticed today as I drove back to work that the problem is back.  I believe there was a September security patch applied over this past weekend... and somehow I feel the problem creeping back is due to that patch triggering something again (but I have no clue what).  I checked and VoLTE is still off.


Has anyone else come across this issue?


I am debating taking this phone to a samsung shop, but speaking to them over the phone they say because I am over 2 weeks they cannot replace it.  Only rip it open to replace internal parts.  The phone is obviously brand new  (less than 30 days).  It seems insane to rip it apart at this point, fearing they will mess it up or the phone will never be the same again.

**Edit.. my bad.. Just noticed this is the EU forums... apologies for that**
First Poster
Galaxy Note20 Series


I have exactly the same problem with a samsung A52 5G

No solution so far

Advice welcomed !


Thank you 

Samsung Maker ★★
Galaxy Note20 Series

Hi @giddyup69 


I'm in the UK using a Samsung N20 Ultra 5G Snapdragon version I imported from Hong Kong.

I'm not sure what's causing your issues and can only relate to my phone which isn't having those issues as far as I can tell.

I have mine set to have Wi-Fi turn On when I come home automatically.

In the UK if a phone is purchased from Samsung UK then we have 30 days as a cooling off period to have the phone refunded or swapped out.

I would let the Samsung Store have hands on to see what they can make of the issue as they may not have to be as invasive as you fear.

Also looking outside of the box it could be your Network provider's masts or your Sim card at issue.

As a process of elimination try another sim card in your phone if you can.

I wish you all the best with this. 

Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.

The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "

First Poster
Galaxy Note20 Series

Same thing is happening to me in the USA. If I leave my Wifi it will just loss connection to the Mobile data. From what forums I have read its because of the 5G and most people have gotten it fixed by sending their phone in for repairs. I am sorry I cannot be without my phone for 2+ weeks. At this moment there doesn't seem to be any actual fix I have personally been able to find. 

Galaxy Note20 Series

Hi - I have exactly the same problem with my new Samsung A52 (4G), bought 2 weeks ago in Italy.

I have tried everything what Samsung customer service told me to do, but no solution so far.

I am very disappointed for this. I chose Samsung to be sure to buy a good device and not having any kind of issues, but I was wrong.
In the past, with other brands (Motorola and Asus) I did not had any kind of issues, and I never had to send devices to repairs.

Next week I will send it to repair and I hope they will manage to fix it.