Need help Cell radio wont turn on after 2020-03-01 security update - AT&T Samsung Galaxy S8+ Guides, News, & Discussion

I am calling out for help on this issue of cell radio not turning on after the update. The device will not even complete an emergency
call.
WHAT I HAVE TRIED
Factory reset twice
Network settings reset
different sim card
manually turning on the radio through activity launcher
Please help it worked fine before the update. See attached screenshots.
Thank you

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i am currently having problems with the new rom, 1.12.00, after a soft reset, when i try to turn the bluetooth on, it shows a message that says i have to turn-off flight mode first. a few soft resets later, it will go back to normal.
how do you downgrade radio versions???
tnx for any reply
There is a new Radio 1.13 uploaded to ftp site. Read here....
http://forum.xda-developers.com/viewtopic.php?t=25465&highlight=

g1 WITH CROSS SIGNALS

I got a g1 which on the cross signals i do the factory reset and now its menu too disappear and its just say for google account
i downgrade it with rc7nbh but its still not activate
what to do for its x signals and menu
NOW I INSERT THE SIM CARD BUT ITS SAY NO SIM CARD
EMERGENCY ONLY
help needed
same problem........
need help
i try lot of thing but still no signals
by mistake i did
factory data reset
and now it
at search networks its giving the error
your sim card does not allow connection to this network
and
then i tryed some radio and spl file......
i donot know what i did and now what should i do
and now there is no signals....
there is a (X) on the signals.......
i attach 2 pic
plzz help us out
hi there
how did you fix your g1 problem

Phone always off: Wireless radio off

I did downgrade my radio from 3.42.50 to version 1.x using SPL 0.41
like someone's thread on xda to get standalone GPS.
Now I have an issue, seems like as u said, some portions of radio aren't overwritten.here some symptoms I got :
1. when booting, WM6 said "Phone Off". in comm manager its status is Flight mode. when I turned on the phone, a pop up shown "Phone is off, do you want to turn it on?" I press yes, but the radio shown no signal. when I tried to make call, phone was turned off again. Can't make any calls at all.
I try with some of official and customize rom.Result is the same.
2. when I enter EPST ##778 and make some changes and then press OK, it said "Turn on LPM failed. Press OK to reset device".
Software and Firmware version can't change
It still 3.09.666.1 and radio rom is 3.42.50.
CDMA setting/EPSt show the item "EVRC enabled" is out of range.
EVRC Enabled: Disabled
Home page: Wild
Home Orig: EVRC
Roam Orig: .......
Can't change anything...It will stop with Written Item "..." error
3. when I use QPST to make PRL changes then press Write to phone, the gauge bar showed 100% but then the device automatically reset (soft). The QPST then showed message something like "Writing process not finished".Same problem shown when I tried to back to 3.42.50 with SPL 2.31.
So, any ideas to help this noob?
Thanks a lot
I am quote this word form
edimonoarfa
http://forum.ppcgeeks.com/showthread.php?t=26082
Dangers of downgrading after installing GPS radio (and a little on signing)
Please help me...
I try to solve this problem for a week.
I read in this forums and xda.., I couldn't find the solution.
What should I do?
Anyone can help,
plz contact by E-mail
plz help , or give me an advise
You shouldn't have downgraded the radio. If you got your hands on ImCoKeMaN's guide, you probably should have read it fully before doing anything. In any case, try flashing the Bell rom, which has 3.42.50 on it (it is a stock rom, so you might be in luck). That might help...
Hey did you fix your problem??
im having the exact same problem. any help anybody?
chrisonline909 said:
im having the exact same problem. any help anybody?
Click to expand...
Click to collapse
Did you read my post?

Data network turns on/off every few seconds

Please i need help...
Yesterday my phone starts to swich on/off network data ramdonly every few seconds and i dont know why. I try to do a factory reset, a clean install of my stock rom (d802) and a clean install of a custom rom without any success.
Also i try to flash different basebands and put new apnĀ“s.... Im desesperated because for me my phone is useless without 2g/3g or 4g data.... It continiously activate and desactivate the data every second :/
I apreciate any help Uu

PX5 problem reboot radio

Hello, I have a problem with the radio, the radio turns on for a while and then goes out, sometimes it works longer.
The second thing is that sometimes it won't start and you need to press the reset button to enable.
It happened because I changed the start screen wallpaper in factory settings, saved and restarted, and after restarting it does not turn on. After what time it turned on and this problem appeared
after trying to update the system such an error
Hard to tell what's the problem from your short description but the error you get on the update would seem to be from the said update not being compatible with your radio. You should contact your seller and ask for the correct update.
nic2k said:
Hard to tell what's the problem from your short description but the error you get on the update would seem to be from the said update not being compatible with your radio. You should contact your seller and ask for the correct update.
Click to expand...
Click to collapse
I have a file from the seller
can it help you install a completely new system?

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