No cellular service, cell radio turned off? - Samsung Galaxy S8+ Questions & Answers

Hello,
I am running the VZW S8+ and my cellular service is not connecting to anything.
The status icon has 0 bars without the "x".
Airplane mode takes an abnormal time to toggle off.
Yes, I've rebooted my device and powered down and waiting for a while.
Yes, I've tried the ejecting SIM card and rebooting method.
I believe that my cell radio has been turned off somehow and I can't access the Android "Testing" menu to toggle it back on via dialer codes.
Please advise. I will try my best to furnish any supplemental information.
E:I went nuclear and factory reset my device.

Did you do a hard reset to restore your phone to its original (default) settings?

Related

[Q] Help! 3g stopped working

My 3g seems to have stopped working. Wifi works fine, and 3g works for a few seconds during startup, then the icon disappears and there's no 3g. The icon always disappears just before the second media scan (does everyone's phone do two media scans during startup?)
I've tried uninstalling or disabling various apps, but every time, the 3g is disabled at startup. It initially stopped working while using Google Navigation. One second it was working, the next, no data, and it hasn't been back since, bar a few seconds during startup.
I'm in a major metro area with coverage, that's not the issue. I tried resetting the ATT WAP to default. That didn't help.
I'd really rather not do a factory reset of my phone.
Can anyone think of any options? Thank you in advance!
Have you tried toggling it into Airport mode and back out? FWIW a similar thing happens on my Nexus One and Milestone. I will have a data connection then it just goes away. The only way for me to get it back is a reboot, toggling data off then on, or toggle airplane mode. I haven't figured out the cause as it happens across multiple devices and multiple ROMs. It may be my SIM card.
Thanks, I tried that. No dice.
So I got it fixed. I'll post this in the hopes that it might help others.
On a whim I downloaded several apps that toggle 3g. Both APNDroid and Quicksettings showed that APN was on. Toggling them off and on didn't help.
But Smart Bar showed that APN was off. Clicking APN on immediately made the 3g icon appear, and it worked. Thank you Smart Bar!

[Q] Samsung Infuse 4G (unlocked) - upgrade

Hi,
My AT&T samsung infuse 4g is unlocked and I am using it on another carrier.
Now I have been recently facing this problem where my phone is randomly switching to 'flight mode'. When I switch it back on by pressing the power button for some time and clicking on 'Airplane mode is on', the option fades out and the problem persists.
When i try turning of the option from settings-> wireless and network - > flight mode, it puts off the green tick and says 'enabling wireless networks'...after few seconds, it again turns on the green tick mark. The problem is still there.
This happens many times a day randomly.
Please help me with the issue. Also, when i had a chat with samsung agent, i was told to perform a factory reset. Is it the only way out of this problem?
If yes, will performing factory reset 'lock' my phone to the AT&T network again?
Also, if I am looking to upgrade my firmware to the gingerbread version through Kies Mini, will this upgrade lock my phone to the AT&T network again?
Any help on these will be appreciated. Thanks.
mspfenu said:
Hi,
My AT&T samsung infuse 4g is unlocked and I am using it on another carrier.
Now I have been recently facing this problem where my phone is randomly switching to 'flight mode'. When I switch it back on by pressing the power button for some time and clicking on 'Airplane mode is on', the option fades out and the problem persists.
When i try turning of the option from settings-> wireless and network - > flight mode, it puts off the green tick and says 'enabling wireless networks'...after few seconds, it again turns on the green tick mark. The problem is still there.
This happens many times a day randomly.
Please help me with the issue. Also, when i had a chat with samsung agent, i was told to perform a factory reset. Is it the only way out of this problem?
If yes, will performing factory reset 'lock' my phone to the AT&T network again?
Also, if I am looking to upgrade my firmware to the gingerbread version through Kies Mini, will this upgrade lock my phone to the AT&T network again?
Any help on these will be appreciated. Thanks.
Click to expand...
Click to collapse
I'm not to familiar with unlocking phones...but a factory reset will not lock you back to Att and I'm pretty sure the kies update won't either
Sent from my SGH-I997 using Tapatalk 2

[Q] Phone antenna/Sim connection problem to network.

My Motorola Milestone XT720 phone all of sudden crashed while charging last week. I eventually got it to recover and boot, but then it went extremely hot and shut down. After removing the sim and SD card, then rebooting it, the phone turned back on. I reinserted the sim, but it won’t connect to my mobile network or to a wi-fi network. I got Sim replaced from Wind mobile and it still wouldn’t work, but my sim works in a old phone.
The phone seem to search for the network and finds Wind and Wind Away, but it won’t connect to Wind Network and goes to emergency call mode only. At one point, it did find the Wind Away network and connected to data, but not the home network. I did a factory reset with no luck, then a manual reset and still wont connect to the network. Finally today I downloaded RSDLite and flashed an SBF, but it still won’t connect to a network.
I almost think the internal antenna doesn’t send out a signal, but am not sure what else I can do to test the phone.
Any ideas or suggestion on why it won’t connect to wind home?
Hey there,
Looks like the baseband (modem) in your phone is fried. Could you dial *#06# and check if it appears 15-digit number ? Your best bet would be to flash stock rom with rsd lite and then wipe through stock recovery.
Hope it helps.

Cellular Radio Permanently Off on COS13

My cellular radio seems to be permanently disabled on COS13. The problem happened completely at random (I picked up my phone and the cellular connection was gone). The phone is a brand-new replacement I got a few weeks ago.
Facts:
The quick settings in the drawer say airplane mode is off
The settings in the power menu say airplane mode is on
I cannot force connect to a cellular network (or view available networks)
The SIM works in another phone
I am running ZNH0EAS2JK
Things I have tried:
Formatting cache
Resetting phone
Removing and re-inserting SIM
Re-flashing through recovery
Has anyone else seen this problem? Any potential solutions would be greatly appreciated!
you could try formatting systen in TWRP and flashing a cm13 nightly. in this way the modem should be reflashed.

LG G5 Sim not detected only for SMS and calls

As stated I'm using the LG G5 H830 T-Mobile variant. I am getting 4G LTE data connection and everything runs well (Not in any WiFi range) Yet for SMS and calling as well as mobile hotspot I get "No USIM card' error. This happened after wiping the system and formatting data. Rebooted recovery (as per instructions on forum) then installed the stock firmware & Patch with systemless root and xposed. After this I did factor reset when just pulling the sim didn't help. Still nothing. I reflashed just the stock firmware with TWRP and SuperSU and issue is still happening. I've disabled rebooted and enabled the phone radio. SIM is in good condition and tray as well everything is SECURE and should be good to go.
I'm assuming a new SIM might be a solution. But I'm not counting on it and with Labor Day tomorrow for me I wouldn't be able to pick one up for 2 days. So here I am...hoping someone might have a fix. I know I don't have many posts on here. But I am an experienced user....just not with the more basic of problems I guess
Thanks!!
Has anyone else experienced this yet? I'm just curious...I had it fixed for a couple days. I've formatted data and done complete system wipe. Tried it resetting phone with the COMPLETE zip and TOT using LGUP. I'm receiving texts. Not calls. Not able to send either. I've activated new sim, didn't help. LG support just told me to look into warranty. T-Mobile needless to say just wanted. Sim card does show stock tmobile short code contacts but phone number shows as unknown. Hotspot won't work. I've tried setting the phone number to the sim. Nothing.
Anyways. I don't think I messed with anything, even so I've done everything to start the phone from scratch. Going to replace it, just more or less curious at this point and maybe others have had the same issue.
I believe I had the same issue as you and it was driving me crazy. I was constantly wiping data, system, etc but my phone kept giving the message "roaming indicator off" where it should show the name of the carrier. This resulted in me having LTE data and that's it- no 3g, no phone calls, etc. I couldn't even access the mobile network menu.
What ended up causing the issue was the network mode setting under wireless networks. Keep in mind at this point I'm running a patched rom which now gives more options in the network mode menu than the phone came factory with. I have an area at work where I have to switch to 3g, GSM/wcdma preferred network setting, because although I have full LTE signal, my connection goes dead. When switching back from 3g I chose the setting lte/CDMA thinking this would force my phone to stay in lte mode due to another area on an upper floor where the phone will constantly drop lte.
Anyways this resulted in my phone saying roaming indicator unavailable, the inability to make or receive phone calls, and either the mobile networks or network mode menus being grayed out. When stuck in this mode there is no way to put the phone back into the standard "GSM/wcdma/lte" mode. Even a complete reflash won't fix it. I even used lgup, which worked for maybe a day until it force closed the phone app and went back to roaming indicator unavail. I wiped every partition and even reflashed radio firmware. Nothing worked.
What ended up fixing it was using an app called v10 hidden settings which allowed me to access the network mode menu directly and re-choose the lte/wcdma/GSM setting. Incidentally on first access to this menu through the app there are only two network settings available. Once you choose a GSM setting, the rest appear.
I'm not sure if this was your issue but I hoped this helped because this took me about a week to workout.

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