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Mobile network not working for MI5 - Critical

Hi MI5 community,
I am unable to use mobile network flawlessly in my MI5. Sometimes SIM1 running, SIM1+SIM2 both running, none of SIM card works. 2 weeks back I mistakenly selected the radio band as USA Band from *#*#4636#*#* -> Phone information1. Then after a fresh flashboot ROM installed problem solved automatically, but ideally this should not be. But now I am having terrible issue with SIM1 and SIM2 signal reception. Finally I have successfully write NV Values which was originally. But even after setting up values to the original, I am not getting mobile network signal. If I put only one SIM card then status bar says No Signal. If I put both SIM then 1st one says No Signal and 2nd one says Emergency calls only. Sometimes randomly SIM1 runs but SIM2 not. sometimes both not, sometimes both. Frustrating experience ever. Would appreciate if anyone can help me.
Looking forward some help from @TheUltrametricSpace especially.

I don't know whether i can help or not but i used to have mobile network fluctuating issue. At the same area, my SIM1 AND 2 will goes from 5 bar to 0, then came back to 3, then back to 0 then back to 5 again. It happen countless of times during the day(or even night). But the problem fixed when i switched to xiaomi.eu rom for mi5. I did do clean wipe system, data via twrp before i switched to xiaomi.eu rom.
Hope that helped

Hi @yChoon
Thanks for adding some views. Yesterday full day I was in latest EU ROM and the whole day I couldn't able to receive any signal. But around 8PM I have received signal @sim1 only. I hope I will be able to find out the culprit someday. But completely clueless

Read this : http://forum.xda-developers.com/mi-5/development/xiaomi-mi5-qualcomm-diagnostic-drivers-t3336200

That is why i tagged him. But he is not responding

Check this : http://en.miui.com/thread-277708-1-1.html

No success

:/ sorry i couldn't help you then. i fixed that problem by my own step above.. if it can't help you, at least i hope it could help other people

Hello @yChoon
I'm having the same issue as you with my Mi5. Did you ever experienced those issues again?

Verizon settings that work

Hi all
I have been looking around and browsed all similar threads but I have not found an answer
Can anyone that uses MI Mix on Verizon (successfully) with working data, calls and SMS help me.
Like tell me what ROM are you using, APN (if manually input), VoLTE on/off, what network mode is it on (CDMA-UMTS..etc)
I cannot get for the life of me to get it to work correctly. I have tried all the Lineage variations posted here and I can either have calls and no data or "No service"
Was thinking to try MIUI 9.5.1 since it just came out but I do not want any of the chinese apps that I won't use or menus half translated.
I will really appreciate any help.
Thank you

I am able to get Messaging and Data successfully, but no incoming or outgoing calls. I spent two days with their advanced Global support only to hear the IMEI isn't compatilble with Verizon. Then why does the data and messaging work?

I have a mi mix and Verizon work fine in my phone no problem everything works

It'll work if you live in an area with Verizon Band 4.

Can make phone calls only on 2g.

Hey guys, i'll start off by saying this is my first post, so go easy on me.
I'm currently running the oxygen OS pie beta 2 on my Oneplus 3T.
A couple of months ago, I had this weird problem pop up. People suddenly couldn't call me. And when I made calls, they say they can't hear me clearly at first and then after about 15 seconds, they can't hear me at all. The surprising thing is, I can hear them clearly on my side. I tried searching for solutions to fix microphone problems but that wasn't it. I thought it was SIM card problem and changed my sim. But the problem persisted. Then I wen't on to change to another carrier, which didn't solve the problem as well. I tried flashing havocOS thinking it might be a problem with oxygenOS, but still, same problem. By now I already know that it's a problem with the phone.
And then I tried switching the network to 2g only and viola. I could make and receive calls. However, data is super slow on EDGE (as expected). So after some time, I tried using 2g/3g automatic as the network setting (hoping the problem would have miraculously gone away). This time, the phone still couldn't make calls but it also got really hot. Sometimes to the point where it's too hot to touch the phone for long (no joke). So I immediately switched back to 2g only. I also tried 2g/3g/4g automatic and this allows me to connect to lte and the phone doesn't get hot but since my carrier has no VoLTE, I still can't make calls as the phone has to drop to 3g for calls. The phone takes a really long time to drop down to 3g and when it does, the calls still don't work and the phone gets hot.
So now i'm stuck on 2g only because I need to make and receive calls but data is just too slow to use. I hope I've given enough information. Any solutions?

Don't have a solution, but just a couple thoughts (shots in the dark, really):
1) What country are you located/what carrier do you use?
2) Does turning WiFi off make any difference? May not make a difference on this device, but I vaguely remember a while back someone having a problem with another device (and maybe a carrier specific issue) not dropping down to 2G for voice calls, and I think it only happened when WiFi was on.

redpoint73 said:
Don't have a solution, but just a couple thoughts (shots in the dark, really):
1) What country are you located/what carrier do you use?
2) Does turning WiFi off make any difference? May not make a difference on this device, but I vaguely remember a while back someone having a problem with another device (and maybe a carrier specific issue) not dropping down to 2G for voice calls, and I think it only happened when WiFi was on.
Click to expand...
Click to collapse
I'm from Malaysia and i'm pretty sure it's not a carrier problem. My sim works on my friends phone perfectly.
Nope, wifi didn't make a differene unfortunately.

Xiaomi mi 9T Pro - Problems receiving calls while on 4G

Hello!
I hope someone can help me with this "little" problem that I'm experimenting with my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) I checked everything before buying and the phone is fully compatible with my carrier (I'm from Venezuela), however, I noticed that when the phone is on 4G it switches to 3G/H/H+ in order to make/receive calls (which is pretty normal since my carrier does not support VoLTE). The problem comes when there is an incoming call, it should switch automatically to 3G/H/H+ BUT it does not happen all the time, in fact, I can say that it only happens 25% of the time when I was testing, of course, when it does not happen there is no way to receive the incoming call.
So far I tried:
- Forcing the phone to stay on 3G (everything works great)
- Testing the different network options (it switches from 4G to 3G but not always and it should)
- Switching from SIM slot 1 to slot 2
- At the moment the preferred network type LTE/TD-SCDMA/UMTS
Could it be a software issue? or could it be related to my carrier? I haven't tried using a SIM card from another carrier.
After all, I bought a PHONE that does not behave like an actual phone all the time, so, I hope someone can help me with this.
Thanks in advance.
Note: I noticed that I might be posted on the wrong section, I'm sorry for that.

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.