Signal problems with s21ultra

[G0UDG]

Are any others having signal issues with the s21ultra our mast is only a 5 minute walk from us yet we get almost zero signal al here is due isn't confined to home the signal is low where I go the phone is great in other areas of use ie: camera wifi use at home but not as a phone wherever I am sensitivity is useless sadly 

[G0UDG]

Yes no issues Steve as I said signal is low wherever I go

[xSteveuk]

Hi,
I found this page
That maybe helpful

Samsung phone has poor signal and cannot use data or make calls

https://www.samsung.com/us/support/troubleshooting/TSG01001598/

[GoanGeek]

I can assure you even people with Pixel phones are having issues.

[xSteveuk]

Do you have wifi Calling enabled?
Does it make any difference
With that disabled

[G0UDG]

No WiFi calling is set to off Steve

[xSteveuk]

Hi
You could give this a go

Remove and Re-Insert Your SIM Card

Before rebooting, turn on Airplane Mode. Wait for 30 seconds, then turn Airplane Mode off.

If you still don't have data, turn airplane mode back on, turn your phone off, wait for a minute, turn your phone back on, turn airplane mode off,

wait for 30 seconds, then turn mobile data on

[Anonymous User]

Oh yes - this is a widely documented issue that Samsung appear not to be taking seriously.

What is the issue?

S21 Ultra UK version has the Samsung 5123b modem, Samsung antennae and Exynos 2100 chip.

S21 Ultra US version has different antennae and SD888 chip (not sure about the model).

Now - the Google Pixel 6 Pro has the 5123b modem and there in-house chip is designed around the Exynos 2100. Google users now reporting signal issues across the world.

Common connection? 5123 modem.

Problem? Samsung refuse to recognise it.

If you are still in your first 30 days, send it back for a refund. Otherwise expect months of problems until Samsung update the modem and engineers fix your phone (IF Samsung ever do).

[Anonymous User]

Mine keeps defaulting to 3g where it can, even in areas where there is good 4g.

At home it prefers WiFi calling even though I have good 4g here.

Known issue widely reported. 5123b modem is the problem.

[Anonymous User]

Get it refunded asap.

You WILL have problems with signal with this device.

I'm still fighting Samsung 6 months on over this issue.

[Anonymous User]

Pixel 6 and 6Pro use the same modem from Samsung as the S21 Ultra.....

I'll leave this here 🙃