HELP: Galaxy S6 Edge SM-G925A Goes to Voicemail When Receiving Calls w/CLEAN OEM IMEI - GSM-Forum

GalaxyVibe · 11-18-2017, 16:18

Hi guys, I have this Samsung Galaxy S6 Edge SM-G925A smartphone. I have to point out that the phone has a ORIGINAL/Never changed IMEI and it has been unlocked by SIM. The problem is that people calling the phone says that the phone rings once and then it goes to the voicemail. Then the phone never rings in my end but it still shows the missed call. The phone also makes phone calls but the it takes around 10 seconds to connect/for the call to go thru. I have done this: Factory reset, Network/Connection Reset, and Full 4 file firmware Odin flash. What do you think guys????? Thanks!

GalaxyVibe · 11-18-2017, 23:43

Does anybody have any idea?

CHANDARAKK · 11-19-2017, 00:55

write new cert than ur problem out

GalaxyVibe · 11-19-2017, 04:35

Quote:

Originally Posted by CHANDARAKK

write new cert than ur problem out

Hi CHANDARAKK, what if I backup the cert and write it again? Also, why do you think that this will solve the problem knowing that this IMEI is the original and the phone is not blacklisted and unlocked by AT&T SIM code?

CHANDARAKK · 11-19-2017, 04:53

Quote:

Originally Posted by GalaxyVibe

Hi CHANDARAKK, what if I backup the cert and write it again? Also, why do you think that this will solve the problem knowing that this IMEI is the original and the phone is not blacklisted and unlocked by AT&T SIM code?

u shoud try new imei it not hard than u will see the result

GalaxyVibe · 11-19-2017, 21:43

Quote:

Originally Posted by CHANDARAKK

u shoud try new imei it not hard than u will see the result

This is what I did:

1. I downgraded to G925AUCS6DQC1 6.0.1
2. I used ENG ROOT for this model
3. I used Z3X to "READ CERT" (To backup the Cert file)
3 . I used Z3X to "Write CERT" using the same CERT file that I just had backed up
4. I flash back the original BOOT.img file of G925AUCS6DQC1 to unroot the phone.

The phone makes phone calls quick now. Please note that if I try to upgrade the phone to 7.0 Nougat, then the problem comes back. It takes a long time to connect to a call. So I had to repeat all whole process again. I also notice that if I tunr off the "DATA" in the phone, the phone calls connect fast too. It seems that there is something wrong in the settings that makes the calls to slow down when the "DATA" is on in the phone.

Any ideas guys??????????????

GalaxyVibe · 11-23-2017, 01:58

Any ideas guys??????????????

kjava · 11-23-2017, 02:38

http://forum.gsmhosting.com/vbb/atta...1&d=1511401048
try this one

GalaxyVibe · 11-23-2017, 02:54

Quote:

Originally Posted by kjava

http://forum.gsmhosting.com/vbb/atta...1&d=1511401048
try this one

Thank you for your help. I am just very curiuos of why this happends to a phone? Why would it connect even though the IMEI is clean??

GalaxyVibe · 12-07-2017, 04:48

Just to clarify, what really made the trick was the fact that I downloaded the firmware from 7.0 Nougat to Marshmallows 6.0.1. In the APN settings, I also added the APN type to: "default,supl,internet,mms,VoLTE,OTA". Also, APN protocol to "IPv4/IPv6". The phone started making quick phone calls again.

PLEASE CLICK ON THE THANKS BUTTON IF THIS POST WAS HELPFULL

11-18-2017, 16:18	#1 (permalink)
GalaxyVibe No Life Poster Join Date: May 2016 Posts: 1,164 Member: 2577670 Status: Offline Thanks Meter: 883	HELP: Galaxy S6 Edge SM-G925A Goes to Voicemail When Receiving Calls w/CLEAN OEM IMEI Hi guys, I have this Samsung Galaxy S6 Edge SM-G925A smartphone. I have to point out that the phone has a ORIGINAL/Never changed IMEI and it has been unlocked by SIM. The problem is that people calling the phone says that the phone rings once and then it goes to the voicemail. Then the phone never rings in my end but it still shows the missed call. The phone also makes phone calls but the it takes around 10 seconds to connect/for the call to go thru. I have done this: Factory reset, Network/Connection Reset, and Full 4 file firmware Odin flash. What do you think guys????? Thanks!

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11-18-2017, 23:43	#2 (permalink)
GalaxyVibe No Life Poster Join Date: May 2016 Posts: 1,164 Member: 2577670 Status: Offline Thanks Meter: 883	Does anybody have any idea?

11-19-2017, 00:55	#3 (permalink)
CHANDARAKK No Life Poster Join Date: Dec 2008 Posts: 3,483 Member: 930280 Status: Offline Thanks Meter: 1,183	write new cert than ur problem out

11-23-2017, 01:58	#7 (permalink)
GalaxyVibe No Life Poster Join Date: May 2016 Posts: 1,164 Member: 2577670 Status: Offline Thanks Meter: 883	Any ideas guys??????????????

12-07-2017, 04:48	#10 (permalink)
GalaxyVibe No Life Poster Join Date: May 2016 Posts: 1,164 Member: 2577670 Status: Offline Thanks Meter: 883	Just to clarify, what really made the trick was the fact that I downloaded the firmware from 7.0 Nougat to Marshmallows 6.0.1. In the APN settings, I also added the APN type to: "default,supl,internet,mms,VoLTE,OTA". Also, APN protocol to "IPv4/IPv6". The phone started making quick phone calls again. PLEASE CLICK ON THE THANKS BUTTON IF THIS POST WAS HELPFULL