Develop Bugs

[Q] emergency calls only, not registered on network

hi there, i have a problem after i flashed custom ROM, the phone gets singal, but said emergency calls only, it's able to search network and i can choose network, but when i try to make call, it said not registered on network, i tried to flash different modem but still not working, any clues about it?? (it shows valid IMEI and serial number, and baseband ver: n7100dxdmf1 network: telkomsel(my current provider) service state: out of service))

I am with the same problem. I bought a Galaxy s4 i9505 from Amazon and the phone has full signal on GSM network, but when I try to make a call appears the same message always... Not registered on network.
I flashed another ROM but the problem can not be fixed. I have read everything about this problem on Google and in this Forum, but no one fixed this problem. I am in Brazil now. Sometimes the phone works. Sometimes not. I am afraid if this could not be a hardware problem. If someone can help some people are with the same problem.
What I already did:
- checked the sim card in other phone and it works ok;
- flashed the original ROM for a brazilian ROM.
I do not know what to do anymore.

123_enic said:
I am with the same problem. I bought a Galaxy s4 i9505 from Amazon and the phone has full signal on GSM network, but when I try to make a call appears the same message always... Not registered on network.
I flashed another ROM but the problem can not be fixed. I have read everything about this problem on Google and in this Forum, but no one fixed this problem. I am in Brazil now. Sometimes the phone works. Sometimes not. I am afraid if this could not be a hardware problem. If someone can help some people are with the same problem.
What I already did:
- checked the sim card in other phone and it works ok;
- flashed the original ROM for a brazilian ROM.
I do not know what to do anymore.
Click to expand...
Click to collapse
Locked phone that your problem,you must hack rom or search code and unlock your phone.

But the phone works sometimes. I do not understand a lot about it, but I thing that if the phone is locked it should not work anytime, or not?
Today I am with full signal on GSM network (and I can register in the network. In others days it was not possible) and it is working in my home. But when I go to other place outside and walk with the phone in the car it not works properly. In this case I just have none or one point of signal and the message of emergency calls appears again. :/ On WCDMA it works SOMETIMES too, but with one or two points of SIGNAL only. Do you think that it is because the phone is locked? By the way, it's the i9505 model. It should be unlocked. I bought it as an unlocked phone to work in Brazil. It is the international version.
Sent from my GT-I9505 using Tapatalk 4 Beta

Anyone else??
Sent from my GT-I9505 using Tapatalk 4 Beta

One more information: the phone now is working ok with GSM network, but when I change for WCDMA I only got one or none point of signal. What it can be? :/
Sent from my GT-I9505 using Tapatalk 4 Beta

Hi
I also have the almost same problem ... I am using a note 2 (n7100) international verient. . It's a factory unlock. . I am using it since almost 9 months. . Suddenly since last week I am getting emergency call only on my status bar i cannot make calls or receive call..I get this on gsm mode .. If i change it to wcdma it works fine... my phone is on stock rom.. I never used any other rom. ... I tried flashing the stock rom again but what happed is just after I flash it the phone works fine one both gsm+wcdma but only for some time like 15to20 minutes... then again I have to change the network to wcdma to get it working...
This problem started suddenly I dint make any changes .. .. no update .. no app uninstall .. nothing it was sudden. ..
my imei is fine .. serial number is fine. .
Please can any one help me out of this problem ... need help please

assam_siddibapa said:
Hi
I also have the almost same problem ... I am using a note 2 (n7100) international verient. . It's a factory unlock. . I am using it since almost 9 months. . Suddenly since last week I am getting emergency call only on my status bar i cannot make calls or receive call..I get this on gsm mode .. If i change it to wcdma it works fine... my phone is on stock rom.. I never used any other rom. ... I tried flashing the stock rom again but what happed is just after I flash it the phone works fine one both gsm+wcdma but only for some time like 15to20 minutes... then again I have to change the network to wcdma to get it working...
This problem started suddenly I dint make any changes .. .. no update .. no app uninstall .. nothing it was sudden. ..
my imei is fine .. serial number is fine. .
Please can any one help me out of this problem ... need help please
Click to expand...
Click to collapse
Hey.. there may be a problem with your network provider.. happened to me too...
I was using vodafone india and i had activated 3g on my n7100.. then i couldn't change to gsm mode. Then i chose another operator (airtel india) and now i can switch to gsm/wcdma irrespective of ny current data pack (2g or 3g)
Sent from my GT-N7100 using XDA Premium 4 mobile app

manan999583 said:
Hey.. there may be a problem with your network provider.. happened to me too...
I was using vodafone ia and i had activated 3g on my n7100.. then i couldn't change to gsm mode. Then i chose another operator (airtel india) and now i can switch to gsm/wcdma irrespective of ny current data pack (2g or 3g)
Sent from my GT-N7100 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I also thought that it was a network problem .. .. I tried Vodafone sim and docomo sim(working in other phone) ... but on my phone It say either no service or emergency call on both 2g and 3g

[Q] "Emergency calls only"

My Zenfone 2 always shows "emergency calls only" on the lockscreen and in the notification pulldown even when there's a working SIM in.
I'm on Vodafone UK.
Is this the same for everyone?

iainmann said:
My Zenfone 2 always shows "emergency calls only" on the lockscreen and in the notification pulldown even when there's a working SIM in.
I'm on Vodafone UK.
Is this the same for everyone?
Click to expand...
Click to collapse
Hi I had this problem all I had to change was the apn Cuz when I updated it changed it for me to a different one
Sent from my BUSH 10.1 TABLET using XDA Free mobile app

rowbaggie22 said:
Hi I had this problem all I had to change was the apn Cuz when I updated it changed it for me to a different one
Sent from my BUSH 10.1 TABLET using XDA Free mobile app
Click to expand...
Click to collapse
Rowbaggie is correct, when you put a sim card into a phone, there are 2 processes during this time
1) handset check the network and perform LU ( location update)
2) if it succeed, then it will pull out all profile details. the SIM card by default would have the postpaid, prepaid 3G, 4G APN in it.
by default network will automate append this APN so user does not have to set it ( unlike wap services)
my guess is that your APN got screwed up, you can go to your service provider website and check for the correct APN to use.
Or call them up.
By the way, APN is also known as Access point in 802.xx. in 3GPP standard it is call APN.

Thanks guys...but my api settings are correct. 3G and 4G works fine.
Sent from my ASUS_Z00AD using XDA Free mobile app

iainmann said:
Thanks guys...but my api settings are correct. 3G and 4G works fine.
Sent from my ASUS_Z00AD using XDA Free mobile app
Click to expand...
Click to collapse
are you able to try this sim on the 3G/4G slot?
lets test it out to eliminate sim slot failing.
perform single sim one 2G first
then perform single sim on 3G/4G
post the result,
next try to put Sim A to 3G/4G and sim B to 2G slot
flip the case and post result.
sound like sim card is not attached to network properly. could be sim loose from slot. i can be wrong.

Ok last night I took sim card out of my phone,its Asus zenfone. Now today the phone won't even read the card ,what do I do?

francisholder said:
Ok last night I took sim card out of my phone,its Asus zenfone. Now today the phone won't even read the card ,what do I do?
Click to expand...
Click to collapse
Could you try with another SIM card? (like from another phone)
Sent from my ASUS_Z00A using XDA Labs

sim 2 mobile data not connecting

I am using mi max 128 GB. mobile data is not connecting with sim 2. With sim 1 it's connecting fine. I tried to connect only 2g also but no use. I had verified the sim with other phone and it's working fine. Both my sims are BSNL and both have working data plans. I tried removing and reinserting sim, rebooting, tinkering with *#*#4636#*#* but nothing worked. To be precise nano sim is working for data connection but micro sim slot i.e sim 2 slot sim is not working for data connection but working fine for calls and messages. Please tell me what to do?

Stock Miui or a custom Rom? Did you try another simcard?

Chainz007 said:
Stock Miui or a custom Rom? Did you try another simcard?
Click to expand...
Click to collapse
It's a stock MIUI 8.2. The OTA update from 8.1 to 8.2 came just now and i updated. Even after update same problem is there. I had also tried with AIRTEL sim. But the data is not connecting.

so what i have to do? any ideas?

piccalo said:
so what i have to do? any ideas?
Click to expand...
Click to collapse
I´m not on Miui to test it, but if you got to Settings -> Sim Cards you can click on Sim-Card 2 and there are some settings like prefered Sim Card Settings or something like that.There you can choose something like for data connection
I bet you've already tried that, haven't you?

Chainz007 said:
I´m not on Miui to test it, but if you got to Settings -> Sim Cards you can click on Sim-Card 2 and there are some settings like prefered Sim Card Settings or something like that.There you can choose something like for data connection
I bet you've already tried that, haven't you?
Click to expand...
Click to collapse
Yes that is the procedure to change the data connection from one sim to other sim. Do I have to go to service center?

piccalo said:
...Do I have to go to service center?
Click to expand...
Click to collapse
Not sure what you mean

Chainz007 said:
Not sure what you mean
Click to expand...
Click to collapse
I mean I have to go to xiomi service center and give my mobile phone for repair?

piccalo said:
I mean I have to go to xiomi service center and give my mobile phone for repair?
Click to expand...
Click to collapse
I can´t give you an answer for that. I´m in Germany and here is no Xiaomi Support for their Devices. If I was you, I would flash another Rom and test it, but if you have a normal warranty you can go to the next service center and let check it by Xiaomi.

Chainz007 said:
I can´t give you an answer for that. I´m in Germany and here is no Xiaomi Support for their Devices. If I was you, I would flash another Rom and test it, but if you have a normal warranty you can go to the next service center and let check it by Xiaomi.
Click to expand...
Click to collapse
Anyway thank you for reply. I will go to service center.

piccalo said:
I am using mi max 128 GB. mobile data is not connecting with sim 2. With sim 1 it's connecting fine. I tried to connect only 2g also but no use. I had verified the sim with other phone and it's working fine. Both my sims are BSNL and both have working data plans. I tried removing and reinserting sim, rebooting, tinkering with *#*#4636#*#* but nothing worked. To be precise nano sim is working for data connection but micro sim slot i.e sim 2 slot sim is not working for data connection but working fine for calls and messages. Please tell me what to do?
Click to expand...
Click to collapse
Two Sim Cards from the same network will not work. Try using a different network sim card in slot 2 and check if it works. When you use two simcards from the same network, are you able to call using sim2?

can you not select it from the bottom menu i can switch sim one or 2 but cannot use both at once

APN

From how much time you are facing this issue?
Is it appeared randomly?
Or it happened after doing something?

UMTS/HSDPA/3G not connecting on MIUI 8 for anyone else?

I have an issue with every build I've tried of MIUI 8 (Stable versions), but not with the developer versions of MIUI 9.
The phone will not connect to UMTS/3G networks with either sim. LTE works fine, and there's no GSM where I live so I can't test that.
It will connect for a moment when first booting up the phone, then immediately disconnect and stay disconnected. It can't find 3G networks when searching either.
Again, this doesn't happen on MIUI 9 builds, but I figure this big of a bug, they would never release it as stable. Can anyone else let me know if they've had this problem?

Hello, I`m having same issue, here in this way. In town there are many repeaters. Here is no problem, in germany many 4G-Networks are working in band 20 (800 mhz). In areas, where no 4G/lte is possible, the mi mix2 (china stable miui8 and china dev miui9) the mix2 can not connect to 3G/UMTS. A smartphone Redmi note 4 with this SIMCard connects to 3G/UMTS and gets connection data to HSDPA+. The mi mix icon diasappears and there is a "emergency" Icon. Then the mi mix2 connect only to GSM and after 1-2 minutes get Data to EDGE. But at this place it is possible to connect to 3G. I rebooted the device many times, changes sim to other slot. Tried China dev and stable. Last test with XIAOMI.EU and EPICROM for MIX2 are sad. Same issue
Many MIX2-User have this effect. I have this effect on Sim-Cards from provider Telefonica/O2. I have tried 3 Sim-cards from provider O2. No 3G - Connect.
In germanys-forums the is a hint to define "force 3G-Connects". Some user writes, that they do not have this effect with this definition.
Does have XIAOMI a 3G-Bug with new MIMIX2??

holger1308 said:
Hello, I`m having same issue, here in this way. In town there are many repeaters. Here is no problem, in germany many 4G-Networks are working in band 20 (800 mhz). In areas, where no 4G/lte is possible, the mi mix2 (china stable miui8 and china dev miui9) the mix2 can not connect to 3G/UMTS. A smartphone Redmi note 4 with this SIMCard connects to 3G/UMTS and gets connection data to HSDPA+. The mi mix icon diasappears and there is a "emergency" Icon. Then the mi mix2 connect only to GSM and after 1-2 minutes get Data to EDGE. But at this place it is possible to connect to 3G. I rebooted the device many times, changes sim to other slot. Tried China dev and stable. Last test with XIAOMI.EU and EPICROM for MIX2 are sad. Same issue
Many MIX2-User have this effect. I have this effect on Sim-Cards from provider Telefonica/O2. I have tried 3 Sim-cards from provider O2. No 3G - Connect.
In germanys-forums the is a hint to define "force 3G-Connects". Some user writes, that they do not have this effect with this definition.
Does have XIAOMI a 3G-Bug with new MIMIX2??
Click to expand...
Click to collapse
You can install the Miui9 radio and it fixes it.

duraaraa said:
You can install the Miui9 radio and it fixes it.
Click to expand...
Click to collapse
Which Radio Version and wehre to get? I am on miui9 beta and having same issue with this o2 card... It is very anoying.

el3c said:
Which Radio Version and wehre to get? I am on miui9 beta and having same issue with this o2 card... It is very anoying.
Click to expand...
Click to collapse
If you're on MIUI 9 beta, you already have the radio I'm talking about.

duraaraa said:
If you're on MIUI 9 beta, you already have the radio I'm talking about.
Click to expand...
Click to collapse
okay, it doenst fixed that
The default Setting for this SIM is: LTE/TD-SCDMA/WCDMA... this is almost wrong, because we havent TD-SCDMA in Germany, i ve switched to LTE/UMTS RPL ...this seems to work better with my o2 card.
Sometimes the connection breaks down from LTE or LTE+ to H+ ...but after the break down, i have no data connection. If i activate flight mode and re enable data, i also get H+ but for now with data connecting. This is very frustrating
Also that my Settings to LTE/UMTS are removed after a reboot or i switch to the second sim. Any suggestions to fix it permanent to LTE/UMTS ?

Did anyone tried MI MIX 2 Global - Version?´ Bug exists still there?

I am on 9.1

I set it on LTE/TD-SCDMA/GSM. I live in Germany too and have a O2 card.
GSM is slower than UMTS cause it's older. But it works without problems.
Now I trying with LTE/TD-SCDMA/UMTS. I have to say that I have some problems too.

Targosch said:
Now I trying with LTE/TD-SCDMA/UMTS. I have to say that I have some problems too.
Click to expand...
Click to collapse
we dont have TD-SCDMA in Germany so, this setting is false... TD-SCDMA is a chinese or asian network standard

el3c said:
we dont have TD-SCDMA in Germany so, this setting is false... TD-SCDMA is a chinese or asian network standard
Click to expand...
Click to collapse
Should I take LTE/UMTS?

Targosch said:
Should I take LTE/UMTS?
Click to expand...
Click to collapse
yep, this seems to works best and also breaks down to gsm if there is no other network available... but...
sim 1 + data card : o2
sim 2 as voice card: D1
if i make a call with sim 1 / D1 my first sim as data sim loose the data connection, even it is connected to a lte network...strange thing today i had a conf call over sim2 for about 4 hours, while this time i didnt recieve any mail or whatsapp.
but if i set sim 2 / D1 as data card and make a voice call, this card wont loose data....strange, maybe a o2 issue?
edit: made a test with D1 as data and if make a call with the o2 card, also d1 loose data instant

I have a new (2.nd) MI MIX 2. And: I have the same Problem. O2 is switching vom GSM/EDGE to UMTS an gets no Connect. Then only "EMRGENCY CALLs". And then GSM again. o2 is provider. roaming is on.
With second SIM (Vodafone) there is no problem. Is there a fix for that problem? One member wrote there is a new "radio". Where to find it?
Same SIM (o2) in a REDMI NOTE 4 (LTE Band 20 800 MHZ) is "ok". It is an MI MIX 2 - Problem!
I have the MIUI 9 Global.
MI MIX2 with O2 and no LTE and no 3G/UMTS??? Joke?

holger1308 said:
I have a new (2.nd) MI MIX 2. And: I have the same Problem. O2 is switching vom GSM/EDGE to UMTS an gets no Connect. Then only "EMRGENCY CALLs". And then GSM again. o2 is provider. roaming is on.
With second SIM (Vodafone) there is no problem. Is there a fix for that problem? One member wrote there is a new "radio". Where to find it?
Same SIM (o2) in a REDMI NOTE 4 (LTE Band 20 800 MHZ) is "ok". It is an MI MIX 2 - Problem!
I have the MIUI 9 Global.
MI MIX2 with O2 and no LTE and no 3G/UMTS??? Joke?
Click to expand...
Click to collapse
change network to LTE/UMTS PRL ...then it should work better PRL = prefered roaming list; go to settings -> about phone -> tap several times on the info about internal storage -> the network app will appear, now you can change network settings... until next boot, then you have to set it again
maybe mix 2 has a problem with national roaming?! cause o2 uses national roaming -> their own network and the network from e-plus

Yes, the MIX 2 does have issues with switching to anything other than LTE. Even when it says it switched to H or H+ there is actually no reception at all and it takes a few minutes for it to recover. Really annoying, hopefully the engineers fix this issue as soon as possible. Pretty inexcusable bug for such a device.

Hello, Switching to " LTE/UMTS PRL" has the effect, only UMTS/3G-Connections are possible. No LTE/4G. Provider: German O2.
XIAOMI might have to fix this bug.
Q: Has anyone took a Message to [email protected] ?? http://en.miui.com/forum.php?mod=bugfeedback&fid=5&page=1

holger1308 said:
Hello, Switching to " LTE/UMTS PRL" has the effect, only UMTS/3G-Connections are possible. No LTE/4G. Provider: German O2.
XIAOMI might have to fix this bug.
Q: Has anyone took a Message to [email protected] ?? http://en.miui.com/forum.php?mod=bugfeedback&fid=5&page=1
Click to expand...
Click to collapse
LTE/UMTS PRL fixed that for me totaly ... i dont had any issues since them! I am also getting LTE and LTE-A with o2 and i am travelling a lot due to my job in germany.
i think its also problem with o2 and national roaming. if you search for this problem in google, you will find the same issue reports from other devices within in the o2 network. I did never had the same problems with my other D1 card in the same device.

LTE/UMTS does not work for me.
Since yesterday I use LTE/TD-SCDMA/UMTS and it works fine.
Provider: O2 Germany

It looks like 3G/HSPA doesn't work when roaming (possibly local roaming too). LTE works fine. In the UK I can get internet all the time regardless of connection type. I travelled abroad and only LTE worked using my UK SIM. This also happens on AOSP based ROMs since I'm using Resurrection Remix and still experienced the issue.

Mr_Bartek said:
It looks like 3G/HSPA doesn't work when roaming (possibly local roaming too). LTE works fine. In the UK I can get internet all the time regardless of connection type. I travelled abroad and only LTE worked using my UK SIM. This also happens on AOSP based ROMs since I'm using Resurrection Remix and still experienced the issue.
Click to expand...
Click to collapse
Yes, this is clearly a firmware-level issue. They need to fix their modem.

Network problem - drop of signal on 3g network

Hi, i have a problem with my mi6 and network provider T mobile from Croatia. When i hit call button on 3g network i have a drop of signal and cant make a call or recive one. On 2g network everthing works fine. I tried with other network providers and mi6 works like a charm. Something is beetwin mi6 and t mobile provider. I tried to change sim, try all roms (china, global, eu rom) and allways the same.
Today i tried to put sim card in new mi mix 2 and phone is working with my sim and can make a call on 3g.
Do you have any solution?
Can i install mi mix2 rom on mi 6, or modem driver?
.... Thanks for answer....

Same issue.
Calls only works ok when in 2g Mode (on 3g always the call drops).
Any solution?

me too. i used the mi5 and mi6 and same problem. i use 2 sim cards. when the first sim is in 2g or 4g never had problems. when i put sim card in 3g, i have problems about once a day with missed calls , no network (ccant make phone calls or receive calls).
i changed the sim card changed roms, and still nothing. its drivingg me crazy. i like xiaomi but these are serious problems.
im in global version miui 9. I live in europe. it happened wiith miui 8 also in xiaomi mi5.
Anyone have suggestions how to resolve this please?

still having this problem. any advice?

still unsolved

problem solved selecting gsm only in second sim with this command *#*#4636#*#*