Has anyone experienced losing mobile data connection intermittently? - Xiaomi Mi A1 Questions & Answers

Has anyone experienced losing mobile data connection intermittently? I noticed that there are several times that mobile data intermittently gets disconnected or loses connection. I experienced this since the first time I used the phone, I am running stock Android One under April 2018 security patch. After the May 2018 security patch I still experience the same intermittent disconnection of mobile data.
I have then rooted the phone using Magisk and still mobile data intermittently gets disconnected, the only remedy is if I reboot the phone.
Is this an inherent issue of the Mi A1? I am thinking of trying our a different custom ROM and see it the issue gets resolved and to rule-out any hardware problem.
Out of topic, what is the most stable custom ROM for Mi A1?
Thanks in advance for any replies.

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[Q] Note4 loosing data connection

Dear Friends,
has some who owned note 4 faced a continuous loosing data connection?
I have been facing this issue for the passed one week till now, I have tried to format the device but the problem is still there, I have not done anything to the device.
I called my ISP and they said that there is no problem with your sim card.
please advise if anyone of you had similar issue.
thanks
silverado said:
Dear Friends,
has some who owned note 4 faced a continuous loosing data connection?
I have been facing this issue for the passed one week till now, I have tried to format the device but the problem is still there, I have not done anything to the device.
I called my ISP and they said that there is no problem with your sim card.
please advise if anyone of you had similar issue.
thanks
Click to expand...
Click to collapse
I've just experienced this today on my 1 day old N910C, I'm on 4G and suddenly earlier today my 4G mobile data indicator disappeared but it still showing the usual signal bars. Tested browsing, no mobile data it said. Tried putting it to Airplane mode then back to normal, didn't bring mobile data back. Rebooted it, then it's working again.
Not yet to see this problem but my friend's Note 4 had this problem. In the end he brought it to the service center and they replace the mainboard. Still wait and see if it fixes the problem.
it happened me before on other samsung devices too. generally an update fixes it but could be hardware problem too.
Hopefully its software related ive seen a slew of note 4s have this issue both variants included.. its annoying to say the least
Hi, I just got my phone, may i know whether you guys have resolved the issues?? i need to turn the flight mode on and off a few times to get the data connection back online
I sent back to Samsung services center, it seems that they said they reprogram the software. Will observe and see how it goes.
Mines all good now few updates and new provider all good ?
Hi guys, I've experienced the same issue, the mobile data connection suddenly drops (H+ icon doesn't disappear but the download arrow is off, meaning that there's no inbound traffic) and the only way to have the connection back is to to disable mobile data and than reactivate it. I've updated my phone, I even tried to install firmwares of other countries (different csc) and to change carrier but I haven't solved the problem (same situation on my friend's N4).
Hi
i had a problem with wifi. weak or no connection.
100% solution for my note:
go to settings=>location=>use GPS ONLY.
perhaps it solves also your problem...
Hello all! Just faced the same problem! Losing internet connection. Did anyone find a solution?
Note 4
Yes this is BS. If I go to a place with no data service, then travel back to a place with data service, I have to first disable then re-enable the "Mobile Data" toggle in the settings. It's such BS that this is happening. My note 3 NEVER has this problem. Starting to dislike Samsung's buggy releases.
Same issues..
silverado said:
Dear Friends,
has some who owned note 4 faced a continuous loosing data connection?
I have been facing this issue for the passed one week till now, I have tried to format the device but the problem is still there, I have not done anything to the device.
I called my ISP and they said that there is no problem with your sim card.
please advise if anyone of you had similar issue.
thanks
Click to expand...
Click to collapse
----- got same problem here.. keep drop the signal.. until fedup already.. can someone solve this thing? Need answer.. T_T
Any news on topic? I'm facing with internet on mobile connection, even if bars are full and LTE sign is visible.
I've also noticed some lack of signal during usage, even if I'm constantly in city.

Trouble connecting Wifi after NRD90U Nougat OTA update

I received my Nexus6P couple of days ago and let it install the latest Marshmallow update that was available through OTA at that time (MTC20L). Now since the OTAs are officially available for the Nexus6p (https://developers.google.com/android/nexus/ota) I sideloaded the Nougat NRD90U build. Since then connection to WIfi is practically not possible. Also survey just sometimes doesnt even show the wifi spots. It SOMETIMES automatically connects.
I tryed:
* tested at several locations with several Routers (2.4Ghz +5 Ghz) all of which worked without a problem on Marshmallow and my old Nexus5
* factory reset
* deleting all saved wlans
* manually forgetting the network
* pretty much tryed every naive debbuing found on sites like this: http://forums.androidcentral.com/am...roubleshooting-wi-fi-connection-problems.html
* same bug with the previous nougat build (that wasnt official, I think NRD90R or NRD90S cant remember)
The strange thing is that I cant really find reports for nougat and Wifi problems on the net. So the question, does anybody else has these issues and by chance a fix?
Something went wrong when you have make the sideload
I made an update from dp5 and have no issues like this.
What don't you try to flash everything one by one to see what happen? Radio, system etc.
Envoyé de mon Nexus 6P en utilisant Tapatalk
for3st said:
The strange thing is that I cant really find reports for nougat and Wifi problems on the net. So the question, does anybody else has these issues and by chance a fix?
Click to expand...
Click to collapse
You must have very poor searching skills. A simple search for 'nougat wifi problem' (without ' ' ) will get you several results.
However, no real solution so far, but Google is aware and a case issue (221056) has been opened on code.google.com/p/android/issues. Unfortunately, it's been more than 2 weeks and Google hasn't come up with a a solution.
I'm experiencing the same problem with my Nexus 5X after an OTA update to Nougat. Resetting network settings seems to solve the problem, that is, until I manually start adding/saving wireless networks. When I hit 12, I loose all visible networks and WiFi keeps scanning (and draining battery) for networks if I turn WiFi off and on. If I let is scan for an hour or so, a connection is established, but when I turn WiFi off and on again the problem starts over.
Some people think it has something to do with 2.4GHz and 5GHz networks, because they can't access 5GHz. Google has advised resetting to factory settings, but that doesn't seem to solve the problem for everyone.

Anyone experiencing LTE disconnect when turning off WiFi ?

Hi all,
I have been using oneplus 6t for two days. It has been performing strongly and i really love this phone.
However I am experiencing a weird issue that when you turn off wifi, the LTE connection seems to be off for a short period. After 3 mins ish it would connect to LTE just fine.
I have tried resetting the network setting but the problem still exists.
Anyone having the same problem ?

Wifi is unusable on android 10

Hi, I have a problem with mi redmi note 7 (lavender)
the problem is that the wifi gets disconnected at some distance (something normal from redmi note 7) the real problem is that it doesn't reconnect, even if i have the router with me, in the lower area of the wifi it shows the message "saved" i try to forget the network and reset the password but i still can't connect, I have to restart the phone to be able to connect normally, but after a while the problem returns.
I'm using a custom rom called AOSIP with android 10, I have already used pixel experience, Crdroid, Evolution x, Havoc os and absolutely, all have the same problem. I want to make it clear that I have already used android 10 on my redmi note 7 (pixel experience) and I didn't have any problems, the problem started after the February updates this year.
I don't think it's a hardware problem because going back to miui or a custom rom with android 9 solves the problem.
I would like to know if you already know about this subject or if you are already working on it or if there is a solution.
thanks
here are some links of the captures I made
https://drive.google.com/file/d/1TEPKK4GGpW8QlM9xzb3FidWZQhxVJZw2/view[/IMG]
https://drive.google.com/file/d/1xAWkt_PYIUnaHLcE2RC-mDaBJYgCq-zE/view[/IMG]
I think you might be onto something. In my case, the problem has been with Wifi Tethering. The phone is basically unusable as a hotspot, cutting out frequently and randomly and I think this has something to do with your wifi problem, maybe a driver issue? Like yourself, I've tried several aosp roms, all have the same problem.
Do you recall the last Pixel Experience release without this wifi issue? I am considering rolling back...
darkhandsome18 said:
I think you might be onto something. In my case, the problem has been with Wifi Tethering. The phone is basically unusable as a hotspot, cutting out frequently and randomly and I think this has something to do with your wifi problem, maybe a driver issue? Like yourself, I've tried several aosp roms, all have the same problem.
Do you recall the last Pixel Experience release without this wifi issue? I am considering rolling back...
Click to expand...
Click to collapse
Good morning, I've already tried the most recent version of pixel experience, in fact the AOSIP rom is from May 17, 2020, practically yesterday.
Obviously it's a driver problem, but I don't understand why all custom roms have the same problem and I don't know how to solve it either (in android 10)
darkhandsome18 said:
I think you might be onto something. In my case, the problem has been with Wifi Tethering. The phone is basically unusable as a hotspot, cutting out frequently and randomly and I think this has something to do with your wifi problem, maybe a driver issue? Like yourself, I've tried several aosp roms, all have the same problem.
Do you recall the last Pixel Experience release without this wifi issue? I am considering rolling back...
Click to expand...
Click to collapse
Could you tell me what rom are you currently using?
Could you also tell me the release date of the rom?
Brxyan said:
Could you tell me what rom are you currently using?
Could you also tell me the release date of the rom?
Click to expand...
Click to collapse
Currently on StagOS May 11 build. I settled on that after trying Pixel Ex, Evolution, etc as it was the one with the least hotspot issues; which isn't saying much as tethered devices would randomly lose internet connection while the phone clearly had internet and you could browse on any browser on the phone.
Since you say the issue occurred for you after the February updates, maybe you could point me to the last stable build you used so I can roll back.
darkhandsome18 said:
Currently on StagOS May 11 build. I settled on that after trying Pixel Ex, Evolution, etc as it was the one with the least hotspot issues; which isn't saying much as tethered devices would randomly lose internet connection while the phone clearly had internet and you could browse on any browser on the phone.
Since you say the issue occurred for you after the February updates, maybe you could point me to the last stable build you used so I can roll back.
Click to expand...
Click to collapse
I recommend all the versions that are from February, I would like to use pixel experience from that date but the page only has recent versions.
if you want a specific version use Crdroid 20200209
crdroid if you keep your old versions in the cloud so I recommend it, but I can not guarantee that it is totally stable. Pixel experience if stable but they don't have the versions of those dates.
darkhandsome18 said:
Currently on StagOS May 11 build. I settled on that after trying Pixel Ex, Evolution, etc as it was the one with the least hotspot issues; which isn't saying much as tethered devices would randomly lose internet connection while the phone clearly had internet and you could browse on any browser on the phone.
Since you say the issue occurred for you after the February updates, maybe you could point me to the last stable build you used so I can roll back.
Click to expand...
Click to collapse
I would like you to install the most recent version of pixel experience and when configuring the wifi, you will move away from the router until the signal goes away and try to connect again, just to check if it is really my phone or not.
Obviously making a backup before and also doing all this is optional. If you don't want to do it there is no problem thanks.
Brxyan said:
I would like you to install the most recent version of pixel experience and when configuring the wifi, you will move away from the router until the signal goes away and try to connect again, just to check if it is really my phone or not.
Obviously making a backup before and also doing all this is optional. If you don't want to do it there is no problem thanks.
Click to expand...
Click to collapse
I already tried StagOs, I still have the same problem with the wifi, I also tried the hotspot and as you say if there is a data problem and in general it is unstable.
I downloaded the latest version of pixel experience and as expected the wifi was still failing, but the hotspot was working correctly so you can install it without any problem.
Brxyan said:
I already tried StagOs, I still have the same problem with the wifi, I also tried the hotspot and as you say if there is a data problem and in general it is unstable.
I downloaded the latest version of pixel experience and as expected the wifi was still failing, but the hotspot was working correctly so you can install it without any problem.
Click to expand...
Click to collapse
Okay sorry for the delay, been busy experimenting. Your recommendation of the Feb 09 crdroid build was spot on, flashed it, wifi and hotspot works like a dream, no issues at all.
After confirming that I decided to take a backup and try a recent AOSP build. I had already tried the Pixel Ex May 11 build and had the same issues so I downloaded the most recent build of Evolution X (May 17) and flashed.
So far, (Fingers crossed) I have not been able to replicate your WiFi issues or my tethering issues. WiFi did not disconnect even at a distance of over 50ft from the router. Keep in mind that these connection issues occur randomly but there's been nothing so far.
I will continue to use this build and test for the rest of the day. If I experience any dropouts I will restore to the stable crdroid build. Maybe you should try the newest evolution or go back to the stable crdroid to test if the issues are software related or specific to your device.
At this point I've been testing the latest build of Evolution (May 17) for about half a day, and zero problems so far, very stable.
I recommend you try it, may fix your wifi issues.
darkhandsome18 said:
Okay sorry for the delay, been busy experimenting. Your recommendation of the Feb 09 crdroid build was spot on, flashed it, wifi and hotspot works like a dream, no issues at all.
After confirming that I decided to take a backup and try a recent AOSP build. I had already tried the Pixel Ex May 11 build and had the same issues so I downloaded the most recent build of Evolution X (May 17) and flashed.
So far, (Fingers crossed) I have not been able to replicate your WiFi issues or my tethering issues. WiFi did not disconnect even at a distance of over 50ft from the router. Keep in mind that these connection issues occur randomly but there's been nothing so far.
I will continue to use this build and test for the rest of the day. If I experience any dropouts I will restore to the stable crdroid build. Maybe you should try the newest evolution or go back to the stable crdroid to test if the issues are software related or specific to your device.
Click to expand...
Click to collapse
I am very happy that I found a solution to your problem, then I made some tests by creating an access point with my sister's phone ( xiaomi mi a1 ) and I performed the distance test and my phone connected normally. After several tests I am reaching a preliminary conclusion that there is an incompatibility with my router, I would need more tests with another router to conclude that my router is practically obsolete. That would also explain why I haven't found another thread with this same problem
good luck, tell me if you have finally solved your problem

Data Connection Problem

Hello everyone, suddenly the data connection of my xiaomi Mi9t/ K20 keeps restarting automatically. Even during a call it switches off and I see the "no signal" symbol on the data connection icon.
It seems to me that when I use more bandwidth, the data connection restarts much more often (when I install a heavy application).
This also happens when the phone is perfectly still, so in my opinion it's a software problem, not a hardware one. In your opinion, if I flash the official ROM again, can the problem be solved?
Attached is the video of my problem.
Your browser is not able to display this video.
Thanks!
What version, which region, have you tried anything yet?
yaro666 said:
What version, which region, have you tried anything yet?
Click to expand...
Click to collapse
Hi! my phone is European (QFJEUXM) and I have MIUI 12.0.5.
I tried to reset the wifi, mobile data and bluetooth.
Since the problem was still there, I decided to format the phone to the factory data. But unfortunately for me nothing has changed, the problem is still there.

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