Lose Signal SIM Activation - Xiaomi Mi 9 Questions & Answers

When I am playing PUBG and I have my 4g LTE and my Wifi network, the SIM activation service down the signal, even if it is already activated!! and when I restart my phone and I do not put the Xiaomi account, the icon of the xiaomi store appears and in both cases it does not know data internet and wifi for about 15 seconds.
It is a real pain of eggs and for this reason I want to change for oneplus.
Some solution?

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[Q] Poor signal (one bar)

hello, I have a new t mobile htc one I got as gift (never opened). My old phone was an unlocked samsung galaxy nexus using a tmobile prepaid sim. I resized this sim to fit the htc one and everything worked fine( full bars for signal). Problem with this sim is that I could not make wifi calls. So I called tmobile and had them activate the new sim which I got with the htc one (Same prepaid plan, no data). i can now make wifi calls. Problem is once wifi is disconnected I only have 1 bar. If I attempt to make a call all bars raise in full, even if i attempt to check my balance the bars automatically jump from 1 to full and back to 1 bar after i see my balance. Is there a setting i need to change or is this normal? i am worried I may be missing calls like this. (All this happens when the wifi is disabled)
Sorry if the post is confusing, I tried to provide all the details but will be happy to provide anything else if necessary.
Thanks!
stephenjones007 said:
hello, I have a new t mobile htc one I got as gift (never opened). My old phone was an unlocked samsung galaxy nexus using a tmobile prepaid sim. I resized this sim to fit the htc one and everything worked fine( full bars for signal). Problem with this sim is that I could not make wifi calls. So I called tmobile and had them activate the new sim which I got with the htc one (Same prepaid plan, no data). i can now make wifi calls. Problem is once wifi is disconnected I only have 1 bar. If I attempt to make a call all bars raise in full, even if i attempt to check my balance the bars automatically jump from 1 to full and back to 1 bar after i see my balance. Is there a setting i need to change or is this normal? i am worried I may be missing calls like this. (All this happens when the wifi is disabled)
Sorry if the post is confusing, I tried to provide all the details but will be happy to provide anything else if necessary.
Thanks!
Click to expand...
Click to collapse
This happens with me sometimes as well...if it is in LTE mode, the signal bars are less...1 , sometime 2, and sometimes 4... as soon as i make call, the data connection is OFF for that moment, and the signal bars are full....as soon as the calls end, the data connection is activated.... the bars are less again.... try changing the data connection modes from LTE to 3G only and to 2G....and see what happens
mathrania said:
This happens with me sometimes as well...if it is in LTE mode, the signal bars are less...1 , sometime 2, and sometimes 4... as soon as i make call, the data connection is OFF for that moment, and the signal bars are full....as soon as the calls end, the data connection is activated.... the bars are less again.... try changing the data connection modes from LTE to 3G only and to 2G....and see what happens
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Click to collapse
Awesome this helps. Thanks. In my situation I have no data plan setup. No need for any internet on my phone atm. So all I use this phone for is calls and an occasional sms. Will I have a longer battery life if i disable lte and have it on gsm only? Would the call signal drop?
stephenjones007 said:
Awesome this helps. Thanks. In my situation I have no data plan setup. No need for any internet on my phone atm. So all I use this phone for is calls and an occasional sms. Will I have a longer battery life if i disable lte and have it on gsm only? Would the call signal drop?
Click to expand...
Click to collapse
i am not sure, but when you dont use Mobile Data on your HTC one, there is no need to select the LTE mode.... you can select the other option always. and it might save battery as well....."might"
You will definitely save on battery if you switch to 2g if you don't use data at all. Switching to 3g frequency takes more battery even when there's no data connection.
I switched it to gsm only then disabled mobile data. Full bars now. This should work. The next option is wcdma which i dont think tmobile uses.

Freedompop won't show network connection in notification bar.

So I'm using this phone with Freedompop's global SIM card as a handy data connection device. I've been using this sim with other phones without a problem, however I have a strange behavior on the Blu R1. Apparently, since the card is always considered "roaming" here in the US, the R1 just shows me a "R" next to my signal bars. However, I am unable to see if I have a network connection, or at what level (3G, H+, etc). I set the network preferences to always connect when roaming, but I hate being in the dark with my connection.
I can pull up a browser and see if it works or not, or open up the Network app or something to see the nitty-gritty status, but its very frustrating to not know how or even IF I'm connected when I'm expecting a message or response. For example, if I'm on H+ I'll accept a video call, but if I'm on 3G I know it'll just end in frustration. Is there any fix/tweak or anything to get around this? Perhaps disable the roaming notification?
I'm not having quite the same problem with FreedomPop. I see the perpetual R for roaming, but I do get bars for network signal strength. (You do have the FreedomPop Sim in slot #1, right? It won't work in Slot #2.)
FreedomPop will ALWAYS show as roaming here in the US. It is part of their instructions actually. But you will not be charged extra for it. I have had the free 200mb, 500 text, 200 minute plan on my sons R1 HD for a few months now and no bills.
If you have Xposed installed, you could use the Roaming Control module to trick your phone into thinking that AT&T and T-mobile aren't roaming networks; it's what I did until I switched to the FreedomPop LTE GSM sims.
Otherwise, I used to use Network Cell Info Lite, where I enabled the notification and set the update rate to 4 seconds--HSPA+ will show up as "3.5G" in the notification icon. It has proper support for dual-sim phones. You could also try Nify, which does show what kind of network connection you're on, but I have no idea if it works with dual-sim phones properly (e.g. will it only show SIM1 all the time, even if you use SIM2 as your primary sim?)

Google duo call connecting issues

I currently have a p20 pro locked bootloader connected to T-mobile carrier in the united states. I cannot connect to my family through google duo because the application is trying to use T-mobile's Vi-LTE service in an infinite loop. When calling, the receiver gets the call, however when they answer, google just says "loading video" forever. My family uses huawei mate 10 pro and huawei p20 pro. I can confirm this is the issue by disconnecting mobile data and going through wifi only. When I am connected to wifi and mobile data, a 4g icon appears next to the signal bar icon. Anyone else having this issue? Is there maybe a method to disconnect video over lte (Vi-LTE)??
Chito307 said:
I currently have a p20 pro locked bootloader connected to T-mobile carrier in the united states. I cannot connect to my family through google duo because the application is trying to use T-mobile's Vi-LTE service in an infinite loop. When calling, the receiver gets the call, however when they answer, google just says "loading video" forever. My family uses huawei mate 10 pro and huawei p20 pro. I can confirm this is the issue by disconnecting mobile data and going through wifi only. When I am connected to wifi and mobile data, a 4g icon appears next to the signal bar icon. Anyone else having this issue? Is there maybe a method to disconnect video over lte (Vi-LTE)??
Click to expand...
Click to collapse
If you're still seeing 4G then your WiFi won't be in use AFAIK.
Reboot your router, run a speed test from where you normally talk over duo. See what you're getting.
Do it over 4G too
Verify your APN make sure it's correct and there are no duplicate APNs in the list.
Or honestly, swerve duo and use WhatsApp mate, it's better quality from my experience.

MI 9/ network problems

Hello everyone,
I have Mi 9 M1902F1G 128gb with MIUI global 11.0.4. I am living in France and using Bouyuges telecom, recently when I come to work my phone loses network connection related to simcard. No calls, no 4G, no 3G nothing absolutely. There is a cross sign sometimes on network bar, then sim card activation process starts but no connection. Even I cannot send an sms. This is a new problem. I have been using this phone with same sim card for approximately for a year.
Thanks in advance
Okuw92
okuw92 said:
... recently when I come to work my phone loses network connection related to simcard.
Click to expand...
Click to collapse
Change job
Since you don't tell us what actions you already have taken the most obvious is to pull out the sim card and clean it. If this doesn't help, contact your operator to get a new sim card. Everything you say indicates that your problem is one with the sim card or the operator and has nothing to do with the phone.
okuw92 said:
Hello everyone,
I have Mi 9 M1902F1G 128gb with MIUI global 11.0.4. I am living in France and using Bouyuges telecom, recently when I come to work my phone loses network connection related to simcard. No calls, no 4G, no 3G nothing absolutely. There is a cross sign sometimes on network bar, then sim card activation process starts but no connection. Even I cannot send an sms. This is a new problem. I have been using this phone with same sim card for approximately for a year.
Thanks in advance
Okuw92
Click to expand...
Click to collapse
Have you tried with VoLTE disabled?
Also, by preferring network type 3G or even 2G, instead of 4G.
Maybe you recently got some some 4G/3G micro-station at work with the band not supported by phone
Edit: You could also try to inspect by Network Cell Info Lite, Net Monster, Net Monitor or similar apps available from Playstore

Question Big issue, No Data during a call.

So One thing I discovered on this new phone of mine is that although working perfectly there is a major flaw in the way Internet data works during a phone call.
Any time you make a call, the phone downgrades the active signal from 5G/4G to H or E ( GSM).
Which in turns cuts off the data.
If I force 5G or 4G, then the phone call cannot be made. It just disconnects.
I have tried all settings, Volte enable/disable with no joy.
Some have said it's a carrier limitation, but it's not, cause in my iPhone, the very same simcard works just fine and the Internet is usable during a call.
Also tried with dual Simcard setup. As in the settings, the phone allows to use one simcard for data and one for call. Still not working.
Can someone please tell me if there is a solution please, or can you try your phone while on the call to see if Internet works as this feature is detrimental to me keeping the phone. If this doesn't work I will be selling the phone and getting a realme replacement.. Xiaomis sometimes suck with their non existent support.
Thanks
Evo400 said:
So One thing I discovered on this new phone of mine is that although working perfectly there is a major flaw in the way Internet data works during a phone call.
Any time you make a call, the phone downgrades the active signal from 5G/4G to H or E ( GSM).
Which in turns cuts off the data.
If I force 5G or 4G, then the phone call cannot be made. It just disconnects.
I have tried all settings, Volte enable/disable with no joy.
Some have said it's a carrier limitation, but it's not, cause in my iPhone, the very same simcard works just fine and the Internet is usable during a call.
Also tried with dual Simcard setup. As in the settings, the phone allows to use one simcard for data and one for call. Still not working.
Can someone please tell me if there is a solution please, or can you try your phone while on the call to see if Internet works as this feature is detrimental to me keeping the phone. If this doesn't work I will be selling the phone and getting a realme replacement.. Xiaomis sometimes suck with their non existent support.
Thanks
Click to expand...
Click to collapse
This comes from the operator who has not yet communicated with Xiaomi.
Same case with 2 operators on the same phone.
What version of rom?
NOSS8 said:
This comes from the operator who has not yet communicated with Xiaomi.
Same case with 2 operators on the same phone.
What version of rom?
Click to expand...
Click to collapse
Global ROM 13.0.4
I can't see an operator fault if they have Volte services enabled and this simcard works flawlessly on other android systems.
As a matter of fact, any SimCard i have tried, so far 3 providers and the phone does the same thing. As soonest the call is made it downgrades the signal to H while full 5G or 4G is available??
Evo400 said:
Global ROM 13.0.4
I can't see an operator fault if they have Volte services enabled and this simcard works flawlessly on other android systems.
As a matter of fact, any SimCard i have tried, so far 3 providers and the phone does the same thing. As soonest the call is made it downgrades the signal to H while full 5G or 4G is available??
Click to expand...
Click to collapse
the operator must provide the necessary information for each brand and phone to activate Volte and Wowifi.
On my 11t pro everything works with SFR and nothing with FREE because Free has not yet transmitted the information necessary to activate the services.
So went to see the operator. They sell Xiaomi phones. 3 network ( Three EU)
The phones in the stores are working just fine, no issues at all. And my phone simply just isnt.I have tried every possible setting and still not working.
See the screenshot below. As I'm typing this I'm on a super fast full signal 5G connection. As soon as I make a phone call, the phone will downgrade to E or H+ which is horrible. This network signal switching is also laggy, and If 2g signal is poor I cannot even make a call.
Evo400 said:
So went to see the operator. They sell Xiaomi phones. 3 network ( Three EU)
The phones in the stores are working just fine, no issues at all. And my phone simply just isnt.I have tried every possible setting and still not working.
See the screenshot below. As I'm typing this I'm on a super fast full signal 5G connection. As soon as I make a phone call, the phone will downgrade to E or H+ which is horrible. This network signal switching is also laggy, and If 2g signal is poor I cannot even make a call.
Click to expand...
Click to collapse
Does the "Use VoLTE" switch appear in the SIM card settings?
If not you can try the Dialer Code *#*#869434#*#*. That only will make this switch appear, but sometimes this is enough. It should also show the little VoLTE-Badge next to the signal strength (see screenshot).
Deleted
I just had another look and on your 1st post it says the SIM is named "3 IRL", as far as I know Three Ireland does not offer VoLTE at all.
So it will always drop to 3G/H+ or 2G/E ... on every phone.
mici01 said:
I just had another look and on your 1st post it says the SIM is named "3 IRL", as far as I know Three Ireland does not offer VoLTE at all.
So it will always drop to 3G/H+ or 2G/E ... on every phone.
Click to expand...
Click to collapse
5G connection should support this naturally. If I put this simcard Into an iPhone or Galaxy the 5G connection stays on regardless.
Anyway even with Vodafone this doesn't work,so I'm thinking it either a phone limitation or a phone is fooked
Evo400 said:
5G connection should support this naturally. If I put this simcard Into an iPhone or Galaxy the 5G connection stays on regardless.
Anyway even with Vodafone this doesn't work,so I'm thinking it either a phone limitation or a phone is fooked
Click to expand...
Click to collapse
No, for VoNR your phone still needs the same configs as with VoLTE. Though only a few operators support VoNR as of now.

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