Mi 8 Doesn't register to the Cellular Network - Xiaomi Mi 8 Questions & Answers

Hello
I have an Mi8 , Was working perfectly before i opened it.
I recently changed Battery and since then , the phone doesn't wants to register on cellular network. It seems to find them , but when i select them , no way he deals with. ( When searching on LTE)
Searching on 2G says that he couldn't seach for mobile Networks.
Phone has a fresh 1Mi12 ROM , Stock not rooted but bootloader unlocked
Anyone had the same issue?
Thanks

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Galaxy-s not working 3g or gprs

Hello,
in Uk a brought a Galaxy-S (T-mobile) and unlocked it. Now I'm back in Italy and I put my old SIM card. The Phone works, except for 3g, edge or any mobile connectivity. I think there is two options:
- The phone is still locked.
- My sim is very old (from 1999), may be no more compatible with 3g.
How do I find out which is the case and how I solve that?
Thanks guys (girls too).
No network
Hi m8
Could you please check your imei number, I did exactly the same.
I bought my sgs on firmware 2.1 & unlocked it via free unlock tool, I then messed with some new firmwares. Recently tried to sell my phone as unlocked but when buyer put their sim in, It shows a signal but no data network connection.
After messing around with different sims i did a check & noticed my firmware is some stupid 04999????
Regards
Mark
What does that mean?? Is it related to IMEI somehow?? What should I check about it? How do I fix that? I've 2.2 by the way

[Q]3G only mode when selected, it is not working/no service

Hi,
I recently had a factory reset, since my Xiaomi MI 3W was not responding! I use wifi most of the time, I have activated 3G data pack from Airtel (Service Provider), MIUI version - MIUI 6.3.9.0 (KXDMIBL) | Stable , the problem that am facing now is, when I select 3G only under Preferred Network Type (Mobile Networks), usually I had selected 3G only before factory reset & it was working fine, but now when I select 3G only there is no signal/service(emergency calls only), when I select 2G only or Prefer 3G, I get the service/signal, but I am unable to browse 3G data! If anyone has a solution, please let me know, since I have no clue of the customer support in India/Bangalore.
Thanks
Lognathan
Hi, I am having the exact same problem. And I'm also on airtel. When I insert this sim into anyother phone the 3g is working in that phone. I have been using this phone from past 1 year and i didn't have any probs until now. And the worst part is the customer service centre and the service provider haven't got a clue apart from throwing the problem on each other rather than finding a solution!!
Naveen.
Lognathan said:
Hi,
I recently had a factory reset, since my Xiaomi MI 3W was not responding! I use wifi most of the time, I have activated 3G data pack from Airtel (Service Provider), MIUI version - MIUI 6.3.9.0 (KXDMIBL) | Stable , the problem that am facing now is, when I select 3G only under Preferred Network Type (Mobile Networks), usually I had selected 3G only before factory reset & it was working fine, but now when I select 3G only there is no signal/service(emergency calls only), when I select 2G only or Prefer 3G, I get the service/signal, but I am unable to browse 3G data! If anyone has a solution, please let me know, since I have no clue of the customer support in India/Bangalore.
Thanks
Lognathan
Click to expand...
Click to collapse
Hello. Were you able to resolve the issue?

No 3G signal X2 Imported from china

Evening good people, I've had my Nokia X2 for some months now and It is the phone I've waited for since my N9. It is perfect in every way except for one issue! I have only Edge signal! No 3G or 3G plus! Setting the sim to 3G only looses all connection. When I first bought the phone it was region locked to china, all language apps came in chinese. After some tinkering I re branded the phone with the Nokia care suite, however this did not fix the problem (neither did Flashing radio, flashing stock rom). Like I've said this is the dream phone and the fact that I can only use it on edge kills me, it's virtually useless without wifi. I'm currently using the LollipopMOD posted here. I've done what I can someone please help! thanks
Hi man . Can you flashing nokdroid for your phone ?
If you can . Do this . Then select english language and config this . Go to settings . And connection setting and select 3g only for your 3g sim card . But seee this you select sim is 3g .
Select your siginals to automatic . Then rebot you phone . If you you dont have siginal . Your phone or your sim is not working correctly . Go to the phone rippears .
Will done .
I only get Edge network too, with T-Mobile USA. I think maybe your carrier, like mine, doesn't support the same frequencies used by the X2DS? I don't like Edge network either, but sometimes you have to take the good with the bad.

not registred on network

hello , anyone facing issue like me ? i got fullbar signal , but cant make call or conected to internet. it said not registered on network. trying to use manual and automatic on mobile network, but problem is still.
i got this problem after upgrading to nougat. please help. mine is n920i

Canada: Redmi 4(India) = Redmi 4X: Internet Working, but unable to make call

I have recently moved to canada and just bought the phone before moving here. Back in India, I had checked if my phone would work in canada and it showed it would.
After coming here, I tried a few network service providers, some didn't work, while for some networks like kudoo and fido, I was able to connect to internet (through phone data), but was unable to make call.
I tried flashing aosp rom and lineage for redmi 4x on my phone, but none of them seem to solve the issue with calling.
I also tried searching for the solution on internet, but couldn't find anything.
Your response would be really appreciated, I strongly believe that the phone should work, I am just missing something.
India and Canada have different bandwitdth . See the pic below .
rkdok23 said:
India and Canada have different bandwitdth . See the pic below .
Click to expand...
Click to collapse
So why is it that the data is working with a few service provider, but calling isn't?
You should ask in redmi 4x sectuon of miui forum
Try
*#*#4636#*#*
Set it to global
And try

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