OK, thanks. Will it help you if I keep posting working and not working here?
Where can I find the LOS developer?
Update for /e/OS 2.7:
Wow, thanks.
The search function in settings stopped working after a while, but works again after a restart.
I got a third party switcher installed and that shows all open apps even though the eos app switcher shows nothing.
The map app seems to be working fine.
1 Like
The option to add restart into recovery to the power menu is checkable but does not do anything.
I like the 2.7 build 
From the start, I could set a pin and add fingerprints.
APPLounge is working properly.
The gesture to switch apps works.
Night Light works
Settings button in drop down menu works
Not working:
Notes App - if I click to use an account it restarts. If I choose Local, it restarts.
I will use the phone and keep you updated
Thanks @ronnz98
—Edit—
Haha! Maybe it says something about how we use our “phones”, or maybe I was focussed on what was not working before.
=> I can not call or sms. Mobile internet is working though.
The camera is not working either. Neither in apps or in the camera app.
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I just noticed something that may explain why my phone functions are not working.
Under about phone, the model is listed as SM-G780G. My actual model is SM-G781B.
Is this the cause??
No, you have the 5G model, the other is the LTE version
| Retail Branding | Marketing Name | Device | Model |
|---|---|---|---|
| Samsung | Galaxy S20 | x1s | SM-G980F |
| Samsung | Galaxy S20 5G | SC-51A | SC-51A |
| Samsung | Galaxy S20 5G | SC51Aa | SC51Aa |
| Samsung | Galaxy S20 5G | SCG01 | SCG01 |
| Samsung | Galaxy S20 5G | x1q | SM-G9810 |
| Samsung | Galaxy S20 5G | x1q | SM-G981N |
| Samsung | Galaxy S20 5G | x1q | SM-G981U |
| Samsung | Galaxy S20 5G | x1q | SM-G981U1 |
| Samsung | Galaxy S20 5G | x1q | SM-G981V |
| Samsung | Galaxy S20 5G | x1q | SM-G981W |
| Samsung | Galaxy S20 5G | x1s | SM-G981B |
| Samsung | Galaxy S20 FE | r8q | SM-G780G |
| Samsung | Galaxy S20 FE | r8s | SM-G780F |
| Samsung | Galaxy S20 FE 5G | r8q | SM-G7810 |
| Samsung | Galaxy S20 FE 5G | r8q | SM-G781B |
| Samsung | Galaxy S20 FE 5G | r8q | SM-G781N |
| Samsung | Galaxy S20 FE 5G | r8q | SM-G781U |
| Samsung | Galaxy S20 FE 5G | r8q | SM-G781U1 |
| Samsung | Galaxy S20 FE 5G | r8q | SM-G781V |
| Samsung | Galaxy S20 FE 5G | r8q | SM-G781W |
| Samsung | Galaxy S20 Ultra 5G | SCG03 | SCG03 |
| Samsung | Galaxy S20 Ultra 5G | z3q | SM-G9880 |
| Samsung | Galaxy S20 Ultra 5G | z3q | SM-G988N |
| Samsung | Galaxy S20 Ultra 5G | z3q | SM-G988Q |
| Samsung | Galaxy S20 Ultra 5G | z3q | SM-G988U |
| Samsung | Galaxy S20 Ultra 5G | z3q | SM-G988U1 |
| Samsung | Galaxy S20 Ultra 5G | z3q | SM-G988W |
| Samsung | Galaxy S20 Ultra 5G | z3s | SM-G988B |
| Samsung | Galaxy S20+ | y2s | SM-G985F |
| Samsung | Galaxy S20+ 5G | SC-52A | SC-52A |
| Samsung | Galaxy S20+ 5G | SCG02 | SCG02 |
| Samsung | Galaxy S20+ 5G | y2q | SM-G9860 |
| Samsung | Galaxy S20+ 5G | y2q | SM-G986N |
| Samsung | Galaxy S20+ 5G | y2q | SM-G986U |
| Samsung | Galaxy S20+ 5G | y2q | SM-G986U1 |
| Samsung | Galaxy S20+ 5G | y2q | SM-G986W |
| Samsung | Galaxy S20+ 5G | y2s | SM-G986B |
He has the SM-G781B, not the SM-G981B Exynos model…
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On the stock rom it said in the phone settings that my model was sm-g781b (/ds).
On the current eos rom it says that my model is sm-g780g.
Both models are r8q according to the table from @piero .
So does the model name therefore have nothing to do with my problems?
I am trying to return to stock before trying again. On samfw.com i found 58 stock roms for my model number and country where it was bought. I am just downloading the newest one. Is this ok?
Here is the filename SAMFW.COM_SM-G781B_DBT_G781BXXSFHXL1_fac.zip
I am not sure, but, the Security Patch level (2025-01-01) may be a problem…
Ok, Thanks.
Is it better to try the oldest one then?
How would you choose?
Is there a better way to return to stock?
LineageOS Android Distribution (LOS) gives a clear indication of the supported model with its latest build (EOL): lineage-21.0-20240810-nightly-r8q-signed
Supported models: Samsung Galaxy S20 FE 4G 2020 (r8q)
SM-G780G / SM-G780G/DS
The LOS download link is no longer available. Alternative: LineageOS-for-microG
(LOS4microG): lineage-21.0-20240826-microG-r8q.zip
Stock Firmware 2024: G780GXXSBEXG1 * BIT-B (BINARY/U/SW REV.)
Stock Firmware 2025: G780GXXSEEXL1 * BIT-E (BINARY/U/SW REV.)
So if i do not have either of those models is there anything i can do?
Should i install a stock rom for my device and then @ronnz98 's build?
Or should i install one of the roms you mention for the r8q variants that are supported and then @ronnz98 's eos build?
I am a bit lost here. Any help telling me exactly what to do, or exactly what to try would be appeciated.
Can you try A14 PixelOS if you still have this issues:
https://xdaforums.com/t/rom-14-unofficial-pixelos-aosp-beta.4678492/
Thanks for the reply.
Are you saying that the 2.7 rom will never work on my device?
I would like to try returning to stock and trying again, unless you are sure this will not work.
Even if i do try out LOS+MicroG or PixelOS, I will have to return to stock first anyway right? Any help letting me know which stock to download, or if it matters would be appreciated.
I am sorry for so many questions, but each time I get an answer, it contains things I do not understand, or that I can not even see how they follow on from my original question.
I am grateful for all your help though. 
No, just follow install instruction of the PixelOS ROM
hi,
I successfully reinstalled a stock rom. telephone, sms and mobile internet were all working. I then reinstalled the 2.7 rom above, but they are still not working there. I get an exclamation mark (!) in the triangle where signal strength is usually shown.
I will go back to stock again and then try the lineage OS rom with microg that @Xxpsilon suggested.
LOS4microG may not be up to date, but it is tried and tested and will work. This is a good basis for further experiments. But please note 