topic Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025) in Galaxy S23 Series

S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

najmul0123 — Wed, 12 Nov 2025 07:08:07 GMT

After the recent software update (One UI 8.0 with the 1st October 2025 security patch), my Galaxy S23 Ultra has started randomly switching between 5G, 4G, and even 3G — even when I’m stationary or on my regular daily commute. Because of this, mobile data has become almost unusable, and calls are frequently dropping or I lose the other person’s voice mid-conversation. What’s strange is that my wife uses the same mobile operator and network (on a Galaxy S25 Ultra) and her phone maintains a stable 5G connection throughout. We both live in Dubai, which has excellent 5G coverage — so it’s definitely not a network issue. This strongly points to a problem with the recent Samsung update. Hoping Samsung acknowledges and fixes this soon — it’s really affecting connectivity and daily usability.

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patc..

Tourbillon De La Vie — Wed, 12 Nov 2025 07:26:21 GMT

Did you attempt any troubleshooting. Was phone bought in dubai

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

najmul0123 — Thu, 20 Nov 2025 07:46:43 GMT

@Tourbillon De La Vie Yes the phone was bought and used in Dubai, I am using it here for last 2 years now. And yes, I have already tried everything — from resetting the network settings, switching SIMs to rule out an operator issue, and even starting the phone in Safe Mode — but the problem still remains. The network keeps dropping continuously. Even when I’m walking in a well-connected area like JLT, the signal suddenly disappears and shows “Emergency calls only.”

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Members_vYnGVB1 — Thu, 27 Nov 2025 00:38:55 GMT

I have the same problems with my s23 ultra, started about the same time and I've also tried the same basic troubleshooting solutions. I've tried different settings, modes, resets, new SIM card, SIM cards from other providers.

Bought the S23 ultra 2 months ago new, it was unused. Everything worked perfectly fine high speeds on 5g, no complaints over the signal and connection both phonecalls and 5g. I live in the Netherlands and work allover the country making 30 phone calls a day, I've tried it 3 days everyone complains about not hearing me, connection is totally lost on all cellular bands half the time, keeps switching to different bands and gsm signal is unstable there's no logic in it.. it must be a software problem but I haven't found the sullution yet.

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

SujayShanbhag — Wed, 24 Dec 2025 12:48:47 GMT

Hi I havent updated the OS I am still one one ui 7. But started having this issues from last week. It must have been the security patch. Have you found any fix??

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

najmul0123 — Wed, 24 Dec 2025 13:10:53 GMT

Sorry to hear about this—I know how frustrating it can be. Since you purchased it only a couple of months ago, it should still be under warranty, so I’d suggest getting it fixed through Samsung Care at no cost. Unfortunately, I ended up upgrading to the S25 Ultra because of this issue.

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

najmul0123 — Wed, 24 Dec 2025 13:12:25 GMT

Unfortunately, I couldn’t find a permanent fix. I tried the usual troubleshooting steps, but the problem kept coming back, which is why I eventually had to upgrade to S25 Ultra.

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Ironmarty — Thu, 25 Dec 2025 21:26:18 GMT

I have same problem as well on my Samsung s23 ultra. I am in US and called local carrier but no luck. This is a device problem and Samsung has not offered to fix. Started after OS upgrade in Oct

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Shojohn11 — Sat, 03 Jan 2026 03:09:34 GMT

I am sorry to hear about the issue you were having but this is nothing new and it is a worldwide problem and it started with the last two most recent updates UI 7 and number 8 including security patches 15 and 16

Samsung will not admit this but the software issue has caused an issue with the antenna, and will not let it make a stable connection to Verizon network and other networks. It'll work fine on Wi-Fi. You can try disabling 5G and you may get sporadic 4G connections in the heart of New York City or Miami or Charlotte North Carolina where the most heaviest signals are I get maybe one bar sometimes.

My family is filled with lawyers thank goodness and they are working on a lawsuit this will be huge it'll make big news once they announce it. Samsung is effectively turned thousands upon thousands of phones into bricks and are doing absolutely nothing about it and taking zero responsibility. I am going to switch to another phone provider and network provider when I can in the meantime I just continue to blast Samsung on my YouTube channels and any person I come in contact with and my customers which there are thousands I tell them to steer clear from Samsung since they don't want to help me and others I will make sure that they are not helped and their financial picture is impacted even if it's just one person but it's literally about a hundred so far that I have converted

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Shojohn11 — Sat, 03 Jan 2026 03:11:06 GMT

Any update It could be UI 7 or 8 sometimes I've heard ui6 and definitely the last two security patches

Samsung is turning their products that we own and trust into bricks and they don't give a f*** but they soon will when this class action lawsuit gets a hold of them that is being prepared as we speak by my family attorneys

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Masalah — Sat, 03 Jan 2026 18:22:28 GMT

S25 has no similar issue?

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Masalah — Sat, 03 Jan 2026 18:23:56 GMT

Any reply from Samsung. I have the same issue

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Members_QybcKS4 — Sun, 04 Jan 2026 00:46:38 GMT

Same thing here. I live in Greece. I started having issues after upgrading. Will probably switch to a new phone by another company since I see no way out of this. Will wait a few days to see if they can provide an updated version

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Shojohn11 — Sun, 04 Jan 2026 05:00:44 GMT

There's absolutely no way Samsung will help you they will not admit fault to the hardware that was damaged That's what I said hardware that was damaged from the software updates. I said this before but my family has a few attorneys and we're working on a class action lawsuit

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Emadba2020 — Sun, 08 Feb 2026 10:33:13 GMT

I have the same problem while I am in Saudi Arabia, the problem is very tiring, is there a solution?

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

najmul0123 — Sun, 08 Feb 2026 12:31:47 GMT

Nothing so far

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

najmul0123 — Sun, 08 Feb 2026 12:31:58 GMT

Nopes

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

najmul0123 — Sun, 08 Feb 2026 12:33:00 GMT

I couldn't find any and had to upgrade to new phone

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

najmul0123 — Sun, 08 Feb 2026 12:33:16 GMT

Good luck 🤞🏼

Re: S23 Ultra – Network Issues After Latest Update (One UI 8.0 / Security Patch 1 Oct 2025)

Shojohn11 — Mon, 09 Feb 2026 14:56:36 GMT

Samsung will give you the runaround on the phone saying they know there's people with problems that they won't admit to it that is their fault. I've spoke just for several experts in the field and had my phone analyzed and the last stock for update corrupted hardware particularly the antenna that's why it's hard to connect to a network only Wi-Fi. My family has two lawyers they're very busy though but they are looking into creating a class section lawsuit it's going to take a while before it's launched but I'll keep you informed