Samsung M20 randomly losing sim signal - Samsung Galaxy M20 Questions & Answers

I bought a new Samsung M20 but I have a problem that appear randomly. I have full sim signal but when someone call me it is like my phone is off so I need to turn off/on air plane mode so that my phone search for network again.
is this problem common? any solution for this?
I updated to pie version.

i had the same problem, at first 4g disconnects and after 30-40 seconds there is no network at all, my problem was solved after pie update, maybe you should try factory reset.

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[Q] 3G problem on Note

Hello
I am a lucky user of Galaxy Note.
I have also a problem with 3G/HSPA modem.
There is mostly working connection,where my download speeds reaches up to 8Mbps,however suddenly it stops transfering the data.
Then I must switch on/off the airplane mode and it works again.
So,where can the problem be? It occurs few times per day and it is very annoying.
I am running on Orange Slovakia network.
Is there any way to upgrade radio/modem stack?
Thanks,Tomas.

No cellular network, no phonecalls possible

hello,
i´m having massive cellular network problems for a while now. The Z2pro won´t find cellular networks more often and even if i´m connected to a network, i´m not able to call anybody or receive calls. Everytime i try to call someone, it resets my network connection, like it would switch Airplane mode on/off. i first thougt it´s an provider problem but my mobile data somehow works fine and i´m able to call/write via WhatsApp.
Did anybody encounter similiar problems?
Phone is on 2.5.335 ST and rooted. I have no "signal booster" apps installed.
~Tuerkay
Someone tell me that they cant reach me with phone, I try to call myself with another phone, but z2 pro is normal.
Yesterday morning, the z2 pro screen off about 8 hours, I test it again but failure in same place and same network.
I turn on the screen, the signal is full and test its call and received function, all thing is normal.
I think, the problem may be background task killed.
Facing the same problem.

Exynos S10 takes a while to find network signal

My S10 takes a while to find mobile signal after restart or when airplane mode is turned off after turning on. A while here is at least a minute to 2. 60-120 seconds. I don't know this is happening all of a sudden. Happened yesterday while travelling. Also I had installed Cellular - Z and Wifi Man apps before this issue. I used Cellulaz extensively and suddenly now a new issue.
I am sure this was not an issue before. I did a network settings reset, cleaned cache and the mobile signal is really good. Now apps that I mentioned above are uninstalled too.
Anyone faced this issue before ?
Happens only on Roaming
This happens only when roaming and the time taken to find mobile signal is 1 minute . When on non roaming, signal is instantaneously found..within 5 seconds
IDK if it's related (probably not) but I've been noticing my US S10 has lost signal entirely and won't regain it unless the device is rebooted. Happened only twice (so far) but that's still 2 times too many.

Mi8 Constantly turning off wifi and turning off mobile data

Hi,
My phone keeps on giving out no service and it also turns off the wifi. Sometimes it can't even find a wifi. Every time it says theres no signal my sim card name changes from 3 (My network) to SIM 1 I hope that has something to do with it. This all started happening when I updated my phone to the latest update (MIUI 10.3.5.0) and since then I can bearly use my phone as its constantly changing internet connections and not working.
Hope you guys know a fix.

problem with india network.

I recently bought rog phone 2 from flipkart in India. My device is working fine. But i noticed there is one problem with the phone and it had happened many times that it automatically reset its network.
Like it automatically turns off wifi ,both sim signal for 10 sec and turn it back on again. This happens once or twice in a day at any period of time.
Sometimes network goes blank and i need to restart the device.
Please help me out if anyone finds the solution. Or people having the same problem.
same
i also have this problem, and im from philippines, seems like the phone triggered the airplane mode, wifi, bluetooth and sim network on and off randomly, you didnt notice the wifi on and off because wifi connects very fast..
jeypee37 said:
i also have this problem, and im from philippines, seems like the phone triggered the airplane mode, wifi, bluetooth and sim network on and off randomly, you didnt notice the wifi on and off because wifi connects very fast..
Click to expand...
Click to collapse
Please share my message futher. So that it spread amongst people. Who would provide any solution for that.
Thank u
prakhar goel said:
I recently bought rog phone 2 from flipkart in India. My device is working fine. But i noticed there is one problem with the phone and it had happened many times that it automatically reset its network.
Like it automatically turns off wifi ,both sim signal for 10 sec and turn it back on again. This happens once or twice in a day at any period of time.
Sometimes network goes blank and i need to restart the device.
Please help me out if anyone finds the solution. Or people having the same problem.
Click to expand...
Click to collapse
you could try do disable Wi-Fi scanning - search in the settings for 'scanning' and under Wi-Fi scanning, disable wifi and bluetooth. it may just fix the issue... so i have read on the telegram group forum

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