[Completed] WiFi connectivity problem - XDA Assist

Hi,
I’m from Portugal and I’ve bought a Mi5 some days ago.
I have a problem for which I don’t find any solution.
The phone came with a modified fake ROM from the Chinese store but was working fine.
I unlocked the phone and installed TWRP to flash other ROMs. I flashed MIUI 8 global stable and a custom ROM from Xiaomi.eu without any problem.
Everything was working fine with the phone but I noticed that a lot of files from prior fake ROM (the one from the Chinese store) remained in the phone. So I decided to swipe everything in TWRP (including system and internal storage) and flashed MIUI Global Stable ROM again.
From this point, I never again been able to connect to a WiFi network and the 2G, 3G LTE connection became very weak and instable. The phone scan the wifi network available without problem, but after introducing the password, it tries to connect and just shows “Saved”.
I tried a lot of stuff. Static IP, reboot router, change router channel, change router security settings, flash different ROM, tweak build.prop file, but the problem persist.
In the phone test menu, when I try to connect to a WiFi I see that the phone scan, connect, disconnect, scan, connect, disconnect…
Any help?
Do you think it’s Hardware related issue? Or phone firmware and driver problem?
I’ll be very grateful for any assistance.

Hi
As youve found your way to the correct section (Xiaomi Mi5 Q&A), this thread is closed
http://forum.xda-developers.com/mi-5/help/wifi-connectivity-problem-t3517777
Wait for other members to reply you in the Mi5 section
Thanks

Related

inexplicable and random network losses

My Moto G XT1039 (Peregrine) was running perfectly on CM 12.1 since July 2015. But two weeks ago it lost network access. This happened without any update or change on the phone. I tried the basic settings : reboot, toggle airplane mode, re-insert sim card... without any success.
Then I followed this thread to take it back to stock : still no network. After that I installed CM13 with this thread : network is back !
But after two days it lost network again. This time I swapped my sim card with another one : ok, problem solved.
For a few days only ! I then fastboot flashed this radio firmware : great, network is back !
And gone again... And now after flashing stock again, CM13 again, radio firmware again, it doesn't connect at all. Except from that everything works, including bluetooth, wifi and gps. The sim card is new and working in other phones. The exact error is : "Error while searching for networks" when I go to Settings | Mobile networks | Network operators.
I'm completely lost and I can't figure what is the root cause of all this. What do you suggest ? Is there a low level log file somewhere on the phone, in which I could find an error like "unable to start radio because XXX" ?
Thanks !
I installed CM13 once again using TWRP. And it's been running fine for the last 3 weeks ! I will never understand what the problem was...
It only loose network for a few seconds from time to time, but this may be normal.
The same problem occured again.
But now I'm sure it's related to the phone and hundreds of people have the same problem. There is a 96 pages topic on official motorola / lenovo support forum about it.
I can't link it here but it's the first result if you type "Post KitKat upgrade BUGs (Loss of signal etc)" in google.

CM13 latest update my phone lost mobile signal/data no turn back Need HELP!

In Sultan CM13 my phone lost signal the moment I enter Roaming, I tried toggling Aeroplane, Changing phone from 2g network to 3g & LTE, also tried to select network operator manually but nothing worked, Any suggestion would be great.
-I tried the *#*#4636#*#* to flip the gsm/lte, tried reboots, etc to no success
-I have IMEI.
-Tried configure no APN no sucess!
-Tried 100% stock via adb Kit Kat updating via ota to the lates COS 13 and still no Connection
-My SIM is detected bus has no Mobile conection ( NO SERVICE )
-Tried flash roms and diferent firmware with TWRP 2.8.6 still no Success
-Emergency call only- when I dial the emergency nunber it keeps dialing endless time and no connection is made no ring !! (Strange!!!!)
A Phone with out mobile network is not a proper phone anymore is garbish
Is there any hope to find a fix for my One :crying:
Try clean flash
rikkk88 said:
In Sultan CM13 my phone lost signal the moment I enter Roaming, I tried toggling Aeroplane, Changing phone from 2g network to 3g & LTE, also tried to select network operator manually but nothing worked, Any suggestion would be great.
-I tried the *#*#4636#*#* to flip the gsm/lte, tried reboots, etc to no success
-I have IMEI.
-Tried configure no APN no sucess!
-Tried 100% stock via adb Kit Kat updating via ota to the lates COS 13 and still no Connection
-My SIM is detected bus has no Mobile conection ( NO SERVICE )
-Tried flash roms and diferent firmware with TWRP 2.8.6 still no Success
-Emergency call only- when I dial the emergency nunber it keeps dialing endless time and no connection is made no ring !! (Strange!!!!)
A Phone with out mobile network is not a proper phone anymore is garbish
Is there any hope to find a fix for my One :crying:
Click to expand...
Click to collapse
Did you tried clean flash COS12.1 or Color OS.
This usually happens due to incompatible Modem with the firmware, bootloader combination.
I also experienced similar issue sometime back using Sultan's build, which is my primary OS right now.
check this post out and the thread.
http://forum.xda-developers.com/showpost.php?p=64764275&postcount=5
Hope this helps!
Rajneeshgadge17 said:
Did you tried clean flash COS12.1 or Color OS.
This usually happens due to incompatible Modem with the firmware, bootloader combination.
I also experienced similar issue sometime back using Sultan's build, which is my primary OS right now.
check this post out and the thread.
http://forum.xda-developers.com/showpost.php?p=64764275&postcount=5
Hope this helps!
Click to expand...
Click to collapse
Well I did the full stock rom to cos 11 updating it until the final incremental cos 13 but no success , never tried color Os I will look! any Rom in specific ?!
Try flashing latest CyanogenOS using fastboot:
https://cyngn.com/support
And if needed modems separately.
All the best!!
I had the same issue a few months ago with CM13 builds. My TWRP recovery was the problem. Try updaing it to the newest version.
dl.twrp.me/bacon/
i had a similar problem after OTA update to CM13.1. So upset I just waited a few days to calm down then went on here and found how someone said sim issues sometimes just need a new sim card. so i went down to my carrier metropcs and they put in a sim adapter for one thing my sim was nano and needed to be made to fit opo micro slot. then they did a refresh and it was good as if it never happened. cost me 15 bucks but worth it compared to what i thought i was up against.

Weird Connection Issue - Two AT&T Connections

I'm having a super weird issue with my OPO. No matter what I do (install different OS, flash new modem, complete wipe including formatting drives to a different format type) I keep getting two AT&T connections on my phone. *Can't post image due to post restrictions*
I am using a WIND sim from Canada with roaming in the US. I used to be able to connect to my choice of either AT&T or Tmobile. Now when I try and connect to one of those carriers, it flashes registered on network but then does not change what network it is registered on. I've tried disconnecting from the network and then trying to connect. Nothing! The only network it will let me connect to is that weird extra AT&T network, and all call through it have no caller ID, just says call from AT&T.
Any ideas of what this could be would really help me out. I'm all out of ideas
Update - After uninstalling and re-installing everything I could think of, I am now running on CM11. If I update through OTA to CM13 the problem returns.
Update 2 - In case anyone else encounters this issue, after a whole lot of work, including softbricking my phone, I managed to get it working. You must install TWRP Materialized and install the 44S baseband. No other recovery will work, must be Materialized. After I installed the 44S baseband I updated to Omnirom 6.0 and everything is working great!

Lost 4G(LTE) connectivity after latest official update

Hello guys,
I am losing my mind here so I kindly ask for help. I aint no expert in flashing roms or anything, I have a stock Redmi 6 and yesterday I got a pop up about updating my phone. I selected yes and my nightmare begins.
Since then, I cant get the phone to connect via mobile network. I cant get any connectivity of any type using mobile data.
The phone is a Redmi 6, android version is 8.1.0 O11019 and rom is MIUI Global 10.2 Stable 10.2.3.0 (OCGMIXM).
Please help the noob get his phone back, I am about to throw it away
There is an update miui_HM6Global_V10.2.4.0.OCGMIXM_f662ddbe15_8.1.zip
http://ru.miui.com/thread-24171-1-1.html
thanks for your reply, updating to 10.2.4.0.OCGMIXM didnt resolve the issue.
Still no 4G.
Any other ideas? Please I am desperate
Head to" about phone" (in settings ) tap " internal storage " multiple times to enter phone info
Then head over to change network settings to LTE only or enable one with LTE as a possible option if you've disabled it by mistake
Also check which slot your sim is in ...
May not work if sim is in secondary slot and 4g is disabled for it
Let me know if it worked !
Cheers !
Thank you for your reply my friend.
I have tried all these things, they were the obvious ones, so I went with them first. Nothing works, phone is unable to connect to 4G. I have flashed multiple times in case it was a bad flash, I even downgraded to a Developers Rom, but nothing works.
Funniest thing of all, I contacted Xiaomi UK customer services today, and after trying various *# codes, and the guy asking me to turn the phone off and then on again, he ended up saying that I need to wait for the next update.
It is insane

My RN7 Pro is stuck on EDGE network. PLEASE HELP. Tried most of the settings.

Hello people, i need some help with my Redmi note 7 pro..
(I'm from INDIA)
Here's the Problem:
I'm not able to use 4G network on my RN7P. I'm stuck on EDGE network. My Sim card is 4G and I've checked almost every settings available normally on my device to help myself.
This problem came after a soft reset (i did that from the settings, not the recovery) .
And here's the twisted part, sometimes I get the 4G network without doing anything, but that happens like once every 2-3 months. And as soon as i restart my device or shut it down, I'm again stuck with EDGE network.
important points:
1. 4G network works fine on my Sim card on other devices (tested). I'm using Airtel.
2. I've checked most of my settings. (Including APNs)
3. I have tried to again reset my phone. Unfortunately it didn't help.
4. I haven't rooted my device, didn't unlock the bootloader and neither installed any custom rom.
5. I'm running MIUI 11.0.2.0 on top of ANDROID 10.
6. Please help me, I'M a student and its getting difficult attending my online classes because of this network problem.
7. Signal strength is always around -51 dbm 99 asu
Some questions:
1. HOW DO I FIX THIS!!????
2. WILL FLASHING A CUSTOM ROM FIX THIS ISSUE?
Okay, so I'm very new to XDA forums, i created my account only a few minutes ago. But i used to visit this site for Downloading custom roms.
Please help me out
MadhulKumar said:
Hello people, i need some help with my Redmi note 7 pro..
(I'm from INDIA)
Here's the Problem:
I'm not able to use 4G network on my RN7P. I'm stuck on EDGE network. My Sim card is 4G and I've checked almost every settings available normally on my device to help myself.
This problem came after a soft reset (i did that from the settings, not the recovery) .
And here's the twisted part, sometimes I get the 4G network without doing anything, but that happens like once every 2-3 months. And as soon as i restart my device or shut it down, I'm again stuck with EDGE network.
important points:
1. 4G network works fine on my Sim card on other devices (tested). I'm using Airtel.
2. I've checked most of my settings. (Including APNs)
3. I have tried to again reset my phone. Unfortunately it didn't help.
4. I haven't rooted my device, didn't unlock the bootloader and neither installed any custom rom.
5. I'm running MIUI 11.0.2.0 on top of ANDROID 10.
6. Please help me, I'M a student and its getting difficult attending my online classes because of this network problem.
7. Signal strength is always around -51 dbm 99 asu
Some questions:
1. HOW DO I FIX THIS!!????
2. WILL FLASHING A CUSTOM ROM FIX THIS ISSUE?
Okay, so I'm very new to XDA forums, i created my account only a few minutes ago. But i used to visit this site for Downloading custom roms.
Please help me out
Click to expand...
Click to collapse
Dial *#*#4636#*#*
Select phone info 1 or 2 (if airtel is in slot 1 then select phone info 1 else phone info 2)
Scroll down and select SET PREFFERED NETWORK TYPE
Choose LTE only from dropdown list.
Let me know if it works or not
Flash this recovery zip via updater (about phone-system update- choose update package- then choose the zip file). See if it works
Here is the link:-
http://bigota.d.miui.com/V11.0.2.0.QFHINXM/miui_VIOLETINGlobal_V11.0.2.0.QFHINXM_73c0bc5751_10.0.zip
Or before using this procedure factory reset one more time and see if the problem is still there.

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