Constantly losing mobile network

[Majorj0nny]

I've had my s21ultra since launch with no problems, over the past month though I've differently been getting terrible mobile phone signal. This seems to go from full bars down to 1 to a dreaded 'no service' circle icon with a line through it. Infact, the very act of trying to make a phone call or send a text sometimes kills the signal itself. Or even, it sometime tries to send me a text or can kill my signal. I've tried my sim in other phones, and tried other Sims in my phone, everything points to the phone. Tried network reset, tried loads of mobile network seeing changes, someone's switching airplane mode on and off helps for a while. It can go for a few days being really stable, then have a fit of the network going off, on, off, on, off, on etc. All that also burns down my battery pretty quickly. 

Dreaded circle

😔

[Majorj0nny]

It was sent back for repairs, I kept saying to the person I dealt with that did they know what the problem was, they assured me they did, it came back fixed from 'sound and signal problems' they replaced the charging port, the SIM tray, and some wire, also scratched the screen. Returned and it was exactly the same problem wise. Ie ... They fixed nothing. I've even since got a new SIM incase something's not right there (I already know it's not the SIM as I've swapped Sims with several phones and problems always with my phone) . I have realised that things tend to improve slightly when I switch from sim tray 1 to 2. Also if I switch down mobile network to 3g and less. 5g seems to have most issues, 4g slightly better but still bad. 3g seems pretty stable ? I've reported it to Samsung again and they are going to get back to me

[Z08]

I have the exact same issue, also only in the last couple of months. Glad to see I am not the only one. The service center staff at my place couldn't solve it, said there was no hardware issue. I also think that it is a problem with switching from 5g to 4g and back. The problem happens to me at the same locations outdoors. Doesn't happen if I switch to 3g/2g manually, so I do that when driving so that at least I am contactable when driving. Do let us know if you manage to get any updates or solutions.

[Majorj0nny]

I'm in the situation now where I've stopped using the phone, had to switch my SIM to another phone just to have full functionality. The repair process was pathetic, many mistake even collecting the device, sent it back claiming it was fixed, yet immediately on putting my SIM in and starting up had the same issues. There's no process to escalate this type of problem, Samsung assume is the repair process can't find a fault then the device is perfectly fine, that assumes the fault diagnostic is checking everything . They obviously are not putting a SIM in to replicate the situation. Samsung have basically told me I'll keep getting to run through the repair process (diagnose... Send for repair... Recieve it back) over and over till something is found. There seems to be no means of escalating something like this for someone else to look at in more depth. I'm dismayed that Samsung support is this way.

[Majorj0nny]

It's there some method is returning a device for a refund if it doesn't work ? Samsung seen to think they have a repair route, but within warranty if my phone has a fault, where do I stand legally to get a replacement of refund ,?

[AndrewL]

@Majorj0nny: I'm really sorry to hear that your network issue has persisted following your recent inspection. Our warranty is repair based, and our engineers will always look to repair a device if it is viable to do so. Alternative Resolutions such as a refund or replacement can only be offered at the discretion of an engineer if the issue is deemed to be the result of a manufacturing defect, or if the same issue persists following multiple inspections (at least 3). I understand that this isn't ideal, and recognise that network related queries can be difficult to replicate, however I recommend getting back in touch with our Help Desk to arrange a further inspection. 

[Kakashi1]

@Majorj0nny any updates regarding the issue . i am also using S21 ultra and facing with the same problem since last month and now its happening on regular basis.

[Belal11]

Hi did you manage to get a fix to this ?

I am having the exact same issue have so for last 2 months. I always carry 2 phones with me on the same network the second phone has no problems at all with network however with my Samsung I am forever loosing network . If I switch to 3g only it's fine but on 4g and 5g I get constant loss of network .

Weird thing is it's only in certain areas but doesn't happen on the second phone. 

[Z08]

I have the exact same issue. My only solution is to keep the phone on 3g all the time. It is fine for me as i do not stream videos on the go, but I can imagine this will be unacceptable for others. My guess is this is some hardware issue with switching of the networks. If it was a software issue with an update, this problem should have been much more widely reported by now?

[Tomh1986]

I have the exact same problem and Samsung haven't been able to solve. It's a nightmare going through their diagnostics when I've tried it all and I know what the issue is. It's like they don't believe you. 

[Majorj0nny]

Sounds like the same experience I had,  just stick to your guns and keep pushing, go through their official fault reporting route and eventually they will accept a repair return, hopefully whoever repairs will just replace the motherboard and problem should be fixed, in my case I had to do this process twice to get to that point as the first time they just changed the SIM tray and charging port and claimed it was fixed after diagnosis came back clear. 

Note though, when you do send this back, type out the fault on some paper with pictures of you can as i found the method of info rathering for the fault was very poor... Only fault info mine has was 'signal problem' using Samsung's online reporting as there's no way of including massive amounts of detail. 

Good luck...