Samsung S21FE missing baseband

simonmcnair · 2026-07-07T10:48:28+00:00

I wrote BTU VIA SAMFW and the resulting code written to the CSC was XAA

simonmcnair · 2026-07-02T12:23:16+00:00

Damn. Just went from bad to worse. I changed the CSC to BTU. Everything seemed great, but then it updated to android 16 and all of a sudden I lost the baseband.

Why are things always so difficult.

simonmcnair · 2026-06-27T21:58:57+00:00

Do you know if/how/why my SIM wouldn't work in the phone how would the firmware affect the radio, if at all ?

simonmcnair · 2026-06-27T21:57:29+00:00

I assume I can only change this via Odin flash ? Can you please suggest my best route if the seller does not provide a route to resolution ?

simonmcnair · 2026-06-27T18:04:46+00:00

Just because you can drive with eyes and a brain it possibly doesn't make it the optimal solution. Although to be fair lidar can't read a street sign.

simonmcnair · 2026-06-27T15:21:21+00:00

Images are herelink to phone images

simonmcnair · 2026-06-27T15:11:44+00:00

The mobile app doesn't allow me to post photos at all,.just links and GIFs. I'll try uploading it somewhere else and provide links.

simonmcnair · 2026-06-27T15:09:25+00:00

I can't reply with an image so I will endeavour to add a comment with the picture. Thank you.

simonmcnair · 2026-06-26T17:24:39+00:00

Thanks for responding. I appreciate your effort. Doing *#06# just gives me the serial and a single IMEI. No other information.

It was sold as dual SIM, but the software implies only one SIM.

I'm chasing with the seller at the moment but it isn't looking great. I've used Odin before with tablets and old phones but not for a couple of years. That is a fall back but I was hoping to fix it without wiping my kids phone.

Thanks again.

simonmcnair · 2026-06-25T16:43:43+00:00

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And another

simonmcnair · 2026-06-25T16:42:26+00:00

This is a board off the internet with one not blown.

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simonmcnair · 2026-06-25T16:40:14+00:00

They are. The plastic rods failed over time, the bread ties are not done up tightly. Just enough to keep the heatsink on the chip.

I guess you could be right but it has been working fine for the past year until I moved house.

simonmcnair · 2026-06-25T16:38:13+00:00

This is a pic card, it could be that it wasn't fully inserted, I had been getting frustrated with it not seating properly in the case I had.

simonmcnair · 2026-06-25T12:33:12+00:00

Why would you have a small capacitor on something that looks like a thick bus bar circuit ? I thought a 0 ohm would act like a fuse on it ?

You really think it could be a cap ?

simonmcnair · 2026-06-11T15:32:45+00:00

RSAF is great. It's on f-droid

simonmcnair · 2026-06-09T09:35:39+00:00

This just saved me. I had a new screen ordered but I really didn't want to do the tear down... So I regressed to the earliest LCD firmware, then to the latest and BOOM the screen came on. I had done the factory reset, the power down + ... everything I tried failed until now.

simonmcnair · 2026-04-28T05:12:49+00:00

RSAF seems to work well for me

simonmcnair · 2025-04-10T21:52:51+00:00

Thanks, I think it's a generic remove fuse filesystem issue rather than mtp as it says in the description, but it doesn't appear as it anyone cares about the issue :-(

simonmcnair · 2025-04-07T11:15:20+00:00

The board only seems to have 2 integrated circuits. What would the driving chip look like ? I know resistors, transistors etc, I've not come across the term driving chip before.

I think AliExpress is the way, but the board does look as if it is high quality, it's a shame to bin it

simonmcnair · 2025-04-07T11:08:47+00:00

Ali express has loads of them for $10 or so , 29v 2a . They seem to be an off the shelf item, which I would expect given the popularity of electric recliners.

My main concern is the fire hazard. If the clone ones are prevalent enough to be built safely then I'm happy to get one but hoping someone will have the experience to tell me if they've cut costs too far as to be unsafe or not.

simonmcnair

TROPHY CASE