Mobile data not working after switching from wifi - Redmi Note 8 Pro Questions & Answers

Hi guys just got redmi note 8 pro and almost every time I go out of reach of wifi my mobile data doesn't work. It happens also if I manually tuen off wifi. I have the H+ icon like it is connected but I don't have data connection. The issue is resolved if I go in and out of airplane mode then I have data connection again. If I just turn off and on data connection in the quick settings it does nothing. APN settings are set and working ok.
MIUI global 11.0.3.

did u find any solution.....

if you are using any 3rd party VPN or using custom DNS then please disable them and try again.

I had the same issue. I emailed Xiaomi's support and also posted it in the Mi community forum. Followed everything (except factory resetting the phone) but nothing was working.
Finally, I was able to find a solution that has fixed this issue for me (I've spent almost a day and haven't experienced it yet).
I was using a single SIM card on my phone. My SIM card only supported 3G network. After trying all the solutions, I grabbed another SIM card (of another network provider) and put it in the second SIM slot. This new SIM card also supports 4G LTE.
At this moment, my phone has 2 SIM cards. One supports only 3G and the other also supports 4G LTE. Though my default mobile data is still set to my original SIM card (3G).
After using two sims simultaneously, I've not experienced this issue again.
So I assume that Redmi note 8 Pro has a bug that doesn't allow mobile data to work properly if there is a single 3G SIM card present in the phone.

I have the same issue.
Works for sometime then suddenly no internet even when it's showing 4G+ sign. I have to turn off the data then on again to get it working which is annoying.
Same issue even with dual sim installed.

Related

[Q] Why Does my Korean N7100 think I'm roaming and not connect to mobile internet?

I bought my n7100 on taobao here in China, and it's a Korean version. I put my China Mobile sim card in, and it makes and receives calls, and text messages and can use wifi with no problem.
The only thing is the mobile data doesn't work. I rooted and tried tweakker, and HiNet, to reset my APN and MMS settings, but that didn't work. My phone still thinks I'm roaming.. it displays
this message "Data Roaming, You have lost data connectivity because you let your home network with data roaming turned off".
I've also tried updating the APN and MMS settings manualy with information i've found on the web.
I've googled and searched this forum and I can't find much. I thought it would be an easy APN settings fix but it seems not to be...
I took my phone in to the local China Mobile store they couldn't fix it. I took it to a local android expert here and they didn't know what to do.
Any ideas would be greatly appreciated.
If you bought a Korean Note 2, you don't (shouldn't) have an N7100. I also purchased one through Taobao.
You should have an SHV-E250S, E250L, or E250K. Which one do you have? Check the baseband version under Settings > About device page.
No matter what, you're going to be limited to 2G only with China Mobile.
You're right, It's SHV-E250S, and I'm fine using the 2g in China on China mobile, but I'd just like to know how..any help?
Baseband Version is E-250SKSVLJK
Try removing all modifications to your APN settings.
Next, go into Settings > More settings > Mobile networks > Network mode and change it to GSM only. Also make sure that Data roaming is not selected. Run a new scan for network operators while you're in there to refresh your APN settings to the right ones.
In data network mode I only have 2 options "3g only" or "LTE Preferred" I have it on 3g only. I have now unchecked data roaming, but I don't see any place to scan for network operators. I have included a few screenshots here, sorry i don't know how to insert them.. http://tinypic.com/r/2198djn/6 http://tinypic.com/r/24dhfmx/6 http://tinypic.com/r/2zof98w/6
Now it's obvious why you don't have data. Is this the stock Korean ROM? Are you rooted?
I can point you to a decent ROM that will fix all of this, provided you have the patience to fix it. It's relatively easy.
Yes it seems to be the stock Korean ROM. I am rooted using http://forum.xda-developers.com/showpost.php?p=31801060&postcount=2 I'm more than willing to flash another rom. I've put about 20 hours into this so far, I imagine I can muster enough patience to finish it
Once they give us a damn Korean Note II section, this kind of information will be a lot easier to find.
Try this ROM for now, it's the one I've been using for a few weeks and I love it.
Link source: http://koxda.com/thread-98683-1-1.html
ROM Download: http://pan.baidu.com/share/link?shareid=149494&uk=3355956772
Password: koxda.com
Thanks a lot the rom (715mb) is downloading now, I have tried to flash ROM's on my old galaxy nexus, and on this note II, but I never succeeded, can you please link me to a good guide, on how to flash this rom? thanks.
Odin is included in the download. If you're using Windows 7 you may or may not have the drivers for the phone, and can grab them out of the All-in-one Toolkit. Just installing the toolkit should install the drivers necessary.
http://forum.xda-developers.com/showthread.php?t=1923956
The ROM you're downloading has two files and two pictures, as well. Open the pictures and follow along. All you have to do is click two buttons, select two files, then hit start. It WILL wipe your phone.
I installed that rom you suggested, I went into settings and did GSM only, and had it automatically find my network (china mobile) selected it, rebooted, and still it says i'm roaming so there is no connectivity... any more ideas?
Can you try somebody else's SIM?
There's no reason you should not be getting service unless something is not right with your SIM or phone.
I installed the rom you suggested, i went into settings and made it GSM only, also had it automatically correctly locate my network (china mobile) and it said "registered on network".. but it still isn't working, same problem, it says no connectivity cus i'm roaming.. any ideas now?
my gf will be home from work in a couple hours, I can try her sim card then.. my sim card was cut by me for my old iPhone.. is it possible or likely that the phone can still make and receive calls, but that somehow data connectivity was affected by me cutting the card? also one guy at the phone fixing store tried his sim card (from another company) and internet worked fine he said..
dadroidda said:
I installed the rom you suggested, i went into settings and made it GSM only, also had it automatically correctly locate my network (china mobile) and it said "registered on network".. but it still isn't working, same problem, it says no connectivity cus i'm roaming.. any ideas now?
Click to expand...
Click to collapse
China mobile have various sim plans, from local to province to national. Are you using the sim in the same city in which you bought it? If not and you don't have a national plan, it could be why the phone is showing roaming. In China going from one province to another is already considered roaming unless you have a national plan. This is from my experience back 2 years ago. Also, you best check at a China mobile shop if you have data activated, gprs/edge is not activated by default, you need to ask them to do it.
I would advise you to switch to China unicom as they have 3g/hspa which is much faster than china mobile.
Sent from my GT-N7105 using xda premium
For clarfication, I am in Hainan, and the card is from hainan. I use the same sim card in my galaxy nexus without any problem. I tried my gf's card just now, it didn't say any problem with connectivity, and did not display roaming.. And it shows the G symbol (for 2 or 3 G I assume), and has up and down arrows next to it.. but it doesn't actually work for browsing the web or using apps over the data network.. I even reset all the APN settings and let it automatically find the China Mobile network, but it didn't help.. what if I try to set the APN settings manualy? and any other ideas??
Showing the G symbol is GPRS, which is 2G. You will not get 3G on the N7100, N7105, or Korean model Note 2 on China Mobile.
Sounds like you need a new SIM card. You can try to set the APN manually to make the data work with hers. I've never had to set an APN manually and I've used many phones here with all 3 carriers, so it's a bit odd to me. No clue why your card doesn't work, but since hers is working fine, it's definitely not your phone.
For the record, her card displayed G, but even after messing with settings, I couldn't get it to have working data network..
Today I bought a new card, and had it officially cut to size, put it in the note II and it's still telling me no data connectivity due to i'm roaming.. i'm so frustrated
edit: after restarting a few times and trying to automatically make it register on china mobile .. it worked on the 4th attempt.. it still displays data roaming, and I had to enable data roaming... but now it works, even though it says i'm roaming?? wtf
Ive the same problem with my Korean galaxy note 2 all voice service work perfect but when I tried to turn on data it says insert Usim Card to access network please help

Dual SIM Data issue: after reboot always on wrong SIM

Hey champs,
I got a strange issue with the swift. Last year I bought 3 Swifts for my wfe and kids. All of them equipped with two SIMs (1&1 for wired phone connections only, Simyo for cheap data flatrate and calls to mobile phone numbers). All phones have been upgraded to Android 6 so far. We use dual sim selector pro to do the call routing to the correct SIM, works like a charme. But regardless what I set in mobile data settings, after reboot the mobile data will always connect to 1&1 mobile networks (in fact it is vodafone) giving us one time a very high bill.
In the meantime I amended the vodafone APN to get rid of it, but this only leads to the situation, that after a reboot there is no mobile data at all. And since my son's phone is locked by funamo parental control, he is even not capable of swithcing mobile data by the settings.
Is there any chance to make the setting permanent? Is there any API call available, so I can get it managed e.g. by tasker? Is there an app available, that deals with data settings on dual SIM phones with Qualcom chipset?
Tnx in advance!
Glad to see I am not the only one with a problem, I live in Spain and use Orange SIM for data and voice, I also have a tesco voice only SIM which I use when in UK. Fine. I have exactly the same problem after a reboot or flat battery, "No Data Connection" when I check the settings it has changed to Tesco (which does not have data) Its only the data scource SIM that changes - voice and SMS remain as Orange. It is very annoying.
Same problem here with stock Android 6.0.1 Cyanogen OS 13.0-ZNH0EAS2NH and EE sims in slot 1 and 2... (one work and other personal).
Was thinking of returning phone, but apart from this problem, I really like it.
Latest Cyanogen OS update, (just installed), appears to have fixed my problem...
I updated, did a battery pull just for good measure, and with several restarts, the correct SIM appears to be selected each time.

Dual sim management and hotspot support

Hi guys, I wanted to open this thread to expose the quite strange behavior I am observing on my oneplus 3.
I use two sims. Both have 3G and LTE fully compatible with op3 bands.
Here is the behavior I am witnessing:
1) Let say I start my phone with data enabled on sim 1.
2) phone starts I have data on sim 1 no data sim 2.
3) I start tethering using the wifi hotspot feature. I connect either with an iPad or W7 or W10 laptop
4) devices can access the Internet using op3 hotspot.
5) now I deactivate hotspot. I switch sim data from sim 1 to sim 2.
6) after a minute or so sim 1 no longer has data enabled and sim 2 has 3G/LTE access through the phone.
7) I switch tethering back on.
8) none of my devices are able to access the internet despite having internet directly with the phone.
Only workaround is to restart the phone with data on sim 2 enabled in order to get data access using tethering on sim 2
Based on my experience, is this an expected behavior?
If choose I tried switching sim slots but no luck. I am questioning myself. Is it an issue on one of the sims or Wirth thé phone?
Anyone had a similar experiencece to share?
Thanks
I've been having a similar issue:
OP3 with OOS 3.2.7.
I have two 4G SIMs, one 3 UK and one EE UK. I can use data (3G/4G) on either without issues and swap between them via the settings on the phone, no problem. I can tether on the 3 UK SIM no problem, both with and without the EE SIM in the second slot or first slot.
The EE SIM will not tether at all in the phone, no matter if it is by itself, with the 3 SIM, in slot 1 or 2, but the SIM does work and tether in my trusty Nexus 4.
I've checked the APN settings and done a network settings reset (Settings > Backup & reset > Network settings reset) but nothing helped.
There's a similar thread on the OnePlus forums here.

Strange problem with dual SIMs

Hello
I tried flashing my p8000 but i was not careful and did not flash correctly. I had problems with TWRP and ROMs.
I spent a lot of hours making things work and i finally i got a stable TWRP with a stock ROM working. Problem was that i lost both IMEIs and could not use the SIMs.
I started searching for solutions (chamelephon, MTK Droid Tools) but nothing seemed to work. I came across a post stating to sent specific commands from android terminal and i finally managed to make the phone showing the 2 IMEIs.
So far so good but again i cannot make both SIMs to work. Only the SIM that has cellular data connection is working. If I switch data to other sim card, the previous sim stops seeing network and second sim is working.
Anyone has any idea?
Cheers
ps. Also, not sure if I am correct or this has to do anything at all, the MP0B_001 file is stored in the path /NVDATA/NVRAM/MD/NVRAM/NVD_IMEI/MP0B_001 from the root directory (NOT root folder) and not in the path ROOT//NVDATA/NVRAM/MD/NVRAM/NVD_IMEI/MP0B_001 as stated in a guideline.
Hi, you can only use one sim on 3g/4g and the second on 2g. I had the same issue in the UK. For example the Three network sim only works with 3g/4g connection as this is the requirement of the network operator. I have 2 of their sims and only one can be connected to a 3g/4g network and the other does not support 2g therefore gets no signal. For your case if one of the sims can operate in a 2g network then assign the 3g to the other and the 2g on this one.

Phone looses 4G Data & Call function on turning off data. APN Settings auto deleting.

Phone looses 4G Data & Call function on turning off data. APN Settings auto deleting.
Hey, I bought a Nokia 6 2018 a couple days ago. Its great but has this one problem. I am using the Indian Model TA-1089.
I have 2 SIM Cards, one is by carrier JIO and another by TATA DOCOMO. I use the JIO SIM as prefered SIM for Data, Calling and SMS. When I put the JIO SIM in SIM Slot 1 and start the phone, it works uptil I turn off Data. Once I turn off Data and let the phone sit for a few mins, the next time I turn on Data the phone doesn't latch onto 4G connection and I don't get internet connection. Also, I cannot place any calls via the same SIM. When I try to place a call, I get a popup saying "Mobile network not available". Although I can receive calls for some reason.
While trying to find the cause of the issue I found out that when the problem occurs, the APN settings are automatically deleted from settings. If I try to manually add APN Profile with the correct values and try to save it, the profile doesn't get saved at all. Also, resetting the APN does nothing.
I tried resetting the network but the problem persists. Factory reset didn't fix it either. Tried another 4G SIM and the same problem occured with it.
Restarting the phone fixes the issue temporarily. So does deactivating and activating it. But its such a hassle.
Surprisingly when I put the JIO SIM in SIM Slot 2, it worked flawlessly. But it still doesn't mean the SIM slot 1 issue is fixed.
Has anyone else had this issue? Please help.

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