Develop Bugs

[Q] help!3G connectivity has gone from my phone

my phone can not connect to 3G networks in most of our city, while it used to work just fine in these same places. at first i thought there must be something wrong with the carrier's base stations. but today i tested my SIM card on another LU6200(Korean version of Nitro HD) and it works perfectly both on 3G and 2g networks on that phone. but when i put it back into my phone, it can only get 2G signal. if i set the Preferred Network Type to WCDMA ONLY, it got no signal with just a cross on the signal bar. i have to put it back into GSM ONLY mode to receive signal.if i go out, i can get partial 3G connectivity here and there, but not consistently. sometimes even if i have full 3G bar signals on the status bar, i can not make calls or connect to the internet.i've got this problem probably after i tried to forcibly go into the Phone Info menu.i got repetitive " the process com.android.phone has stopped unexpectedly" promps , and i just ignored it and tried again. now ,2 options are missing from the menu, LTE/WCDMA/GSM and LTE Global.in place of them, it's UNKNOWN. i already tried flashing KDZ package of no avail. Does this mean a hardware malfucntion or software glitch?Please help!Thank you in advance

No one can answer?

freefall12 said:
No one can answer?
Click to expand...
Click to collapse
Ask att store for a different sim card i had lte issues and new sim card helped try that
LG NITRO-N XDA APP

Well you do HAVE GSM only selected. THATS 2G(EDGE)
for 3G you would need to select WCDMA

hyelton said:
Well you do HAVE GSM only selected. THATS 2G(EDGE)
for 3G you would need to select WCDMA
Click to expand...
Click to collapse
^^^So true
LG NITRO-N XDA APP

no, if i select wcdma, i got no signal.it should be hardware problem

[Q] how to get the GSM network working??

smthn went wrong with my SGW and since then when i turn my network mode into "GSM only" it doesnt connect to my service provider (instead of writing the name of my band it writes 'emergency calls only) inspite of the fact that the network icon in the status bar is showing a present network

Telco provider ?
They Support GSM or not ?
Sent from my GT-I8150 using xda premium

andynroid said:
Telco provider ?
They Support GSM or not ?
Click to expand...
Click to collapse
whats meant by telco ?? (im from egypt so idk the meaning of sm words )
my provider supports GSM and i used to work on it alot since the 3G consumes more battery but my phone crashed once and since then i cant get the GSM working even after getting a whole new stock rom

You set up APN for your Service Provider??
Settings/Wireless & Networks/Mobile Networks/Access Point Names
Here you need settings from your provider, to allow you use Mobile Internet, MMS
Usually, these are there, in Stock ROM.....but, not necessarily with new Custom Roms.
Perhaps these are missing, if so, you need to contact provider, or check on-line with provider. Settings can be sent via SMS from provider.. ..otherwise need to be entered manually!!
Sent from my SGW GT-I8150 using Tapatalk!!

i already did it before and its working very well on the 3G but the problem is wn i get on 2G i cant access network or even make ordinary phone calls 'only stuck with the emergency calls only'

btw the pic i sent is wn im working on GSM (2G) while wn i work on 3G it tells me me band name instead of 'emergency calls only' and on 3G i can access network and make phone calls while on 2G i cant do these stuff
ive also changed the SIM card to another provider and its still exactly the same issue

[Q] Can any genius solve my problem

HI, I am using Micromax canvas 4 from last 5 months. From last 3 months I am facing coverage issue in my home town. I am using Airtel network. The cell doesn't catch good range in my home only. Also many times calls get dropped. But when I tried same sim in other cell, it catches good network and calls to didn't get drop. Same is the issue with GPRS. GPRS too didn't connect quickly and transfer data very slowly but other devices don't give these problems with same sim. I had complained to Airtel and their engineer didn't find any problem in their network. Very interesting is that when I move outside my town, the same cell canvas 4 doesn't give any problem. It works perfectly. And please note other network doesn't give any error in my home town. I asked about this thing to one of the mobile expert about this, he told me that Airtel works on 1800mhz frequency and so canvas 4 might b not catching good range in that frequency. Can anyone help me to solve the issue?

I thought I will get the help here but no one genius replied to my query. I m very upset.

anupdada said:
HI, I am using Micromax canvas 4 from last 5 months. From last 3 months I am facing coverage issue in my home town. I am using Airtel network. The cell doesn't catch good range in my home only. Also many times calls get dropped. But when I tried same sim in other cell, it catches good network and calls to didn't get drop. Same is the issue with GPRS. GPRS too didn't connect quickly and transfer data very slowly but other devices don't give these problems with same sim. I had complained to Airtel and their engineer didn't find any problem in their network. Very interesting is that when I move outside my town, the same cell canvas 4 doesn't give any problem. It works perfectly. And please note other network doesn't give any error in my home town. I asked about this thing to one of the mobile expert about this, he told me that Airtel works on 1800mhz frequency and so canvas 4 might b not catching good range in that frequency. Can anyone help me to solve the issue?
Click to expand...
Click to collapse
I have never heard such a problem before. I am also a Canvas 4 airtel user but i dint face any issue.
maybe you have not turned your 3G service OFF ( by default 3G service is ON on one of the SIM)
1. Goto settings>
2.wireless and networks> more
3.mobile networks>3G service >OFF
This generally occurs when you are not in a 3G circle or you may have not subscribed to the 3G services.
(Don't forget to press thanks if it solved your problem)
else use a vodafone sim in the other slot.

Bro if u will go by my advice just flash stock v14, I also had same problem solved it by flashing v14 @anupdada

@ashutosh. I m not a beginner my friend. Actually there is no problem in 3g mode. Only in 2g there is a problem. I found that if I am nearer to the tower the is no problem as such. It doesn't catch good net work if tower is at far distance.
@Alok brother how to do it. Hope I don't need to root for that. It's under warranty that's y. Pls provide me stock rom.

Which version are u on? U can check it under settings >>about phone and see the custom build version

@alok singh It's S9111B_MP_F2F3F5F8_B1_IN_MMX_14_FLASHER_USER

alok singh said:
Bro if u will go by my advice just flash stock v14, I also had same problem solved it by flashing v14 @anupdada
Click to expand...
Click to collapse
Bro are u talking about RomBuzz v1.4?
Sent from my C2305 using XDA Free mobile app

@rahul110 Do u face similar problem brother?

U r already on v14, I don't know why you are facing this problem

Yes bro.
Sent from my C2305 using XDA Free mobile app

Brother I think no one genius here to solve our problem.

Do one thing, select ur network manually, select Airtel 3g if u have 3g plan activated else select Airtel 2g, see if this solves ur problem @anupdada @rahul110

anupdada said:
@ashutosh. I m not a beginner my friend. Actually there is no problem in 3g mode. Only in 2g there is a problem. I found that if I am nearer to the tower the is no problem as such. It doesn't catch good net work if tower is at far distance.
@Alok brother how to do it. Hope I don't need to root for that. It's under warranty that's y. Pls provide me stock rom.
Click to expand...
Click to collapse
it maybe a hardware problem or your service provider in a particular area. Do you face the same problem with other sim cards too? other than airtel? Maybe there are more number of airtel users in that area and less TDMA slots available. But i am not sure still you can try using a different sim card.
Or you can try flashing the stock rom once again. But it will wipe your data so dont forget to take backup of your phone memory or app memory. http://www.skyneel.com/2014/02/Micromax-A210-Canvas-4-get-new-update-Stock-Rom-V2.html

ashutoshtaikar said:
it maybe a hardware problem or your service provider in a particular area. Do you face the same problem with other sim cards too? other than airtel? Maybe there are more number of airtel users in that area and less TDMA slots available. But i am not sure still you can try using a different sim card.
Or you can try flashing the stock rom once again. But it will wipe your data so dont forget to take backup of your phone memory or app memory. http://www.skyneel.com/2014/02/Micromax-A210-Canvas-4-get-new-update-Stock-Rom-V2.html
Click to expand...
Click to collapse
This problem doesn't come with other network brother.

Weird network issue... no network when switching to 3G/4G :(

I am in a fix here!!! Since long I have been facing this problem wherein, whenever I switch to 3G/4G mode, my phone looses network forever.. It seems to work perfectly fine in 2G mode.. I tried everything.. playing with radios, factory resetting and all the other help that I could get but in vain. I thought it is a hardware issue and since mine is an imported one, and I don't have warranty, I was avoiding to take it to a repair centre.. A week back, I went to Malaysia for a trip, and as I put a local SIM, my 3G starts working perfectly fine... I thought it could be a radio issue and as I came back to India, to my surprise my old local SIM was working fine in 3G mode yet again!!! I thought somehow my problem was sorted!!! It worked for 2 days and it is back to the old problem now.. no 3G whatsoever!!!! Please help me guys!!!

I was just browsing and I read an samsung user facing the same problem.. The carried switched his normal SIM to USIM.. and it started working.. could this be a valid issue?

try this.
cool_sid007 said:
I am in a fix here!!! Since long I have been facing this problem wherein, whenever I switch to 3G/4G mode, my phone looses network forever.. It seems to work perfectly fine in 2G mode.. I tried everything.. playing with radios, factory resetting and all the other help that I could get but in vain. I thought it is a hardware issue and since mine is an imported one, and I don't have warranty, I was avoiding to take it to a repair centre.. A week back, I went to Malaysia for a trip, and as I put a local SIM, my 3G starts working perfectly fine... I thought it could be a radio issue and as I came back to India, to my surprise my old local SIM was working fine in 3G mode yet again!!! I thought somehow my problem was sorted!!! It worked for 2 days and it is back to the old problem now.. no 3G whatsoever!!!! Please help me guys!!!
Click to expand...
Click to collapse
enter to this menu *#*#4636#*#*
go to phone information
and change the option lte/gsm to WCDMA prederred.
and dissable data and enable it again.
one question are you s-off?
might sound crazy my question.
If you are not s-off flash the boot.img of the rom again

Tried it bro.. doesn't work.. yes i am s-off.. thats how I could switch radios as well..

cool_sid007 said:
Tried it bro.. doesn't work.. yes i am s-off.. thats how I could switch radios as well..
Click to expand...
Click to collapse
If changing the settings in Phone Info did not help I have to agree that you need a different sim or different APN settings.

The same SIM works with the same APN in other phones... and even if it was an APN issue then the data would have been a problem.. But i don't even get network in 3G..
Sent from my HTC One_M8 using XDA Free mobile app

No help??

cool_sid007 said:
I am in a fix here!!! Since long I have been facing this problem wherein, whenever I switch to 3G/4G mode, my phone looses network forever.. It seems to work perfectly fine in 2G mode.. I tried everything.. playing with radios, factory resetting and all the other help that I could get but in vain. I thought it is a hardware issue and since mine is an imported one, and I don't have warranty, I was avoiding to take it to a repair centre.. A week back, I went to Malaysia for a trip, and as I put a local SIM, my 3G starts working perfectly fine... I thought it could be a radio issue and as I came back to India, to my surprise my old local SIM was working fine in 3G mode yet again!!! I thought somehow my problem was sorted!!! It worked for 2 days and it is back to the old problem now.. no 3G whatsoever!!!! Please help me guys!!!
Click to expand...
Click to collapse
did you solve the problem?? since am facing the same problem and i don't know how to solve it

quican said:
did you solve the problem?? since am facing the same problem and i don't know how to solve it
Click to expand...
Click to collapse
Post as much detail about your problem, if you want to get help.
What version M8?
Is it modded (custom ROM, root, s-off) or stock?
What region/carrier, and more importantly, what bands used for 3G and LTE?
What does it say for OS number in bootloader screen?
You've verified the SIM works for 3G and/or LTE on another device?

redpoint73 said:
Post as much detail about your problem, if you want to get help.
What version M8?
Is it modded (custom ROM, root, s-off) or stock?
What region/carrier, and more importantly, what bands used for 3G and LTE?
What does it say for OS number in bootloader screen?
You've verified the SIM works for 3G and/or LTE on another device?
Click to expand...
Click to collapse
The SIM does work for 3G and LTE on other devices,
its modded with:
(***RELOCKED***
M8_UL_CA PVT SHIP S-OFF
CID-11111111
HBOOT-3.19.0.0000
RADIO-1.29.213311491.05G
OpenDSP-v51.2.2-00593-M8974_FO.1015
OS-6.12.1540.4
eMMC-boot 2048MB
Nov 27 2015,01:21:29.3
)
in Tanzania and my carrier is (Airtel with bands 900, 1800 and 2100) and (TTCL which is 4G LTE)

quican said:
OS-6.12.1540.4
in Tanzania and my carrier is (Airtel with bands 900, 1800 and 2100) and (TTCL which is 4G LTE)
Click to expand...
Click to collapse
According to the following webpage, the 3G band used by Airtel is Tanzania is 2100 MHz (900 and 1800 listed are only for GSM/2G): http://www.worldtimezone.com/gsm.html
As this webpage also lists " 4G LTE TTCL" I will have to assume you got the info from the same or similar website. And that doesn't tell us what band your carrier uses for LTE/4G.
The 3G band 2100 MHz is supported by your current firmware. Make sure you have properly input the APN info for your carrier in the phone's settings.
LTE is trickier. Even with the proper band support and APN, you might not get LTE using an M8 version not intended for your region/carrier. But 3G should be possible.

I did but the 4G symbols is showed on the network bar once in a while. And it does not last long when it shows up!
For the TTCL sim card i can not access the network at all since it does not allow 2G services!

The same here. I face the problem yesterday =)) LTE icon show for the first time and then after a reboot, 3G and LTE signal gone forever =)) Now Edge only. Trying to fix it.

Network problem on ONE PLUS 3

I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?

[email protected] said:
I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?
Click to expand...
Click to collapse
thats probably because jio is a 4g only network and oneplus 3 doesn't support both sims running 4g at the same time.

bonham1988 said:
thats probably because jio is a 4g only network and oneplus 3 doesn't support both sims running 4g at the same time.
Click to expand...
Click to collapse
But bsnl is not 4g right?

[email protected] said:
But bsnl is not 4g right?
Click to expand...
Click to collapse
That doesn't matter, you can only set 4g network on the sim that has an active data connection. Suppose you have idea and Airtel and both have 4g, which ever sim is your data sim will be able to have 4g access.
Sent from my OnePlus3 using XDA Labs

[email protected] said:
I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down
---------- Post added at 07:42 AM ---------- Previous post was at 07:41 AM ----------
nikhil.agrawal said:
That doesn't matter, you can only set 4g network on the sim that has an active data connection. Suppose you have idea and Airtel and both have 4g, which ever sim is your data sim will be able to have 4g access.
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down