topic Re: Re: Re: Re: Re: Re: Re: Disappearing 4G and 5G in Galaxy A Series

Disappearing 4G and 5G

SquirrelSpider — Fri, 28 Feb 2025 18:13:34 GMT

I have this strange problem with my A55 - 4G and 5G disappears multiple times a day and only comes back if I restart the phone. Any ideas? SIM card works alright in other phone.

Re: Disappearing 4G and 5G

BandOfBrothers — Fri, 28 Feb 2025 18:21:45 GMT

Hello 👋 @SquirrelSpider

Does this happen in a particular area or everywhere 🤔 I'm thinking maybe network congestion or a mast issue.

If a phone is dual sim then sometimes trying the sim in the secondary slot can help.

There is a diagnostic tool found in the Samsung Members App.

And you can reset the network connection via Settings > General Management > Reset > Reset Mobile Network Connection

Clear Cache Files from the phone's System Partition Section > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to insert your earphones or hook upto a powered On Laptop or use a Tv's USB Port or a usb-c to usb-c phone to phone set up to access the Clear Partition Section. This may help with lag or stutters as this clears the phone of old/unused or broken cache files.There is also a Repair Apps option in the Menu System too { Possibly excluding the s²⁴ Series of phone's }

A Samsung Service Centre can assess the phone if necessary.

If i can be of any further help please don't hesitate to ask 😎

Re: Disappearing 4G and 5G

SquirrelSpider — Fri, 28 Feb 2025 18:29:15 GMT

I ran the diagnostic tool, it said both SIM and network connection was okay. The issue seems to be random. Sometimes it happens once a week, sometimes twice in an hour. Once 4G and 5G disappears, it doesn't come back even many hours later and even if I go into a different area with excellent 4G/5G. After restart though, 9 out of 10 I promptly have excellent 4G/5G even in the very area where I lost them...

Re: Disappearing 4G and 5G

Piper123 — Fri, 28 Feb 2025 18:40:11 GMT

Hey there

When you lose connection, are you connecting to a WiFi service such as BT WiFi or similar when out and about?

There have been other threads on this, have you searched the forum for any solutions already found?

Re: Re: Disappearing 4G and 5G

SquirrelSpider — Fri, 28 Feb 2025 18:43:27 GMT

Not usually. What happens usually, is that I have great 5G/4G, then as I walk signal shows weaker and weaker and eventually goes to H+ or H, then it gets stuck on H+ or H. But it's not really poor network. Almost always if I restart the phone right there and then I have good/excellent 5G/4G once again

Re: Re: Re: Disappearing 4G and 5G

Piper123 — Fri, 28 Feb 2025 19:07:02 GMT

Are you on O2 by any chance as the other 3 networks have phased out 3g

Re: Re: Re: Re: Disappearing 4G and 5G

SquirrelSpider — Fri, 28 Feb 2025 19:11:34 GMT

Yes, O2

Re: Re: Re: Re: Re: Disappearing 4G and 5G

Piper123 — Fri, 28 Feb 2025 19:37:08 GMT

OK so O2 is a weaker network so wondering if there are works going on in your area for example that have resulted in a weak signal currently

Re: Re: Re: Re: Re: Re: Disappearing 4G and 5G

SquirrelSpider — Fri, 28 Feb 2025 19:40:19 GMT

Don't think so.. It already happened in 8-10 different towns...

Re: Re: Re: Re: Re: Re: Re: Disappearing 4G and 5G

Piper123 — Fri, 28 Feb 2025 20:20:55 GMT

OK that's helpful to know.

So it sounds more like a sim card or device issue.

Please go to:

Settings
Connections
Reset MOBILE network settings

This will reset your network APNs but you won't lose data. Your network O2 will automatically send you new And in seconds and they'll install in the background.

Re: Re: Re: Re: Re: Re: Re: Re: Disappearing 4G and 5G

SquirrelSpider — Fri, 28 Feb 2025 20:35:05 GMT

I tried this already, no luck. Also, the same SIM card is perfect in my old OnePlus phone, no problem with 4G/5G with that phone, using the same SIM

Re: Disappearing 4G and 5G

Members_i0jLRtG — Thu, 22 May 2025 21:12:49 GMT

I have same problem om my new A56 5G, but I found today what is the problem (dont know how to solve yet). When you are out of wifi range and you loose mobile network there is some flag in system that marks "your offline" for apps. It doesnt change state when you reconnect to 5G or LTE. Phone shows 5g active, but apps claims that there is no intenret access. Reset of lte settings or going into flight mode is not helping. Only solutions is to either reset phone or connect to any wifi as this resets the flag. Do anyone knows how this works internally and maybe knows better way? Its very annoing when I travel with train and loose this connection multiple times when no wifi in range...

Re: Disappearing 4G and 5G

Members_YnPudCN — Mon, 27 Oct 2025 16:24:21 GMT

Hi. Did you solve the problem? I have the same issue with my A56 5G...