I need to solve an issue pertaining to my Galaxy s6 duos. The problem is that sometimes my phone's sim 2 wont work, although it is registered on the network but it won't make a call or send a message neither would it receive a call or message. After i put the phone in airplane mode and switch it back online,then the sim2 starts working. Please help me in solving this issue. What could be causing this problem?
Hmmm set sim 2 only to 2G network and check if it losse connection... (I suspect when phone leaves a 4g area and it has to connect to 3g sometimes stuck at searching ...)
I have an issue that whenever i use mobile data on sim 2 it connects to 2g. I need all the time to go and change from 3g/2g to only 3g then back again to get 3g working. Also noticed that if 3g is not in range it switches to 2g but when its in range it does not automatically take 3g.
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i have Samsung galaxy Ace s5830M
my problem is with 3g internet
after i subscribe with 3g i face a problem that's my phone cant get the 3g it only show 2g internet with slow speed show only letter E instead of 3G or H
the setting for 3g subscription 100% right
the 2g mode setting is unchecked
my place is covered with 3g network
i tried to put my SIM card on another identical phone Samsung galaxy ace and the other phone is working very good with 3g coverage showing H on the status bar while my phone only show E
i tried by reinstalling the software and the problem still exist
i tried by entering *#*#4636#*#* and change the setting to Wcdma proffered i got the same result
and when i changed the setting to Wcdma only i got no signal, no connection
i tried to connect with the network operator telling me that there is no problem with connection the problem is in the phone
any one can help me to fix this problem
Sending it back to Samsung or your carrier is the best solution if you do not know what to do.
By default the Network Mode is on LTE/WCDMA/GSM (Auto) mode but when I switch on mobile data, nothing shows up, no data connection. And sometimes even no voice service, it shows "emergency calls only".
But when I switch to GSM only mode, EDGE connection shows up (which is normal), Internet goes normal but very slow with EDGE connection (Sometime GPRS).
I tried to swap SIM with my friend, and their SIM works fine with my phone under LTE/WCDMA/GSM (Auto) mode and I do get HSPA and HSPA+ Signal. (Network provider setting changed to their network provider)
I contact my network provider and they said my SIM has no problem, they did insert my SIM into their device and found no problem with my SIM on their device, they get HSPA+ signal with my SIM. And they ask me to take my phone to check for hardware failure.
I checked the APNs and network provider setting, reset back to Stock ROM and clean install my ROM several times, still have no luck
My subscription do have HSPA connection and has been using it for months at the same location, but now it just stay at EDGE and GPRS only.
Is that really a hardware problem? Or could it be SIM problem?
Device Info:
Device: Samsung Galaxy Ace 3 LTE (S7275R)
ROM: CM13-20160315build
Recovery: TWRP 3.0.0.0
Xposed: Xposed v80 sdk23 arm
Network Provider: redONE
Hui0531 said:
By default the Network Mode is on LTE/WCDMA/GSM (Auto) mode but when I switch on mobile data, nothing shows up, no data connection. And sometimes even no voice service, it shows "emergency calls only".
But when I switch to GSM only mode, EDGE connection shows up (which is normal), Internet goes normal but very slow with EDGE connection (Sometime GPRS).
I tried to swap SIM with my friend, and their SIM works fine with my phone under LTE/WCDMA/GSM (Auto) mode and I do get HSPA and HSPA+ Signal. (Network provider setting changed to their network provider)
I contact my network provider and they said my SIM has no problem, they did insert my SIM into their device and found no problem with my SIM on their device, they get HSPA+ signal with my SIM. And they ask me to take my phone to check for hardware failure.
I checked the APNs and network provider setting, reset back to Stock ROM and clean install my ROM several times, still have no luck
My subscription do have HSPA connection and has been using it for months at the same location, but now it just stay at EDGE and GPRS only.
Is that really a hardware problem? Or could it be SIM problem?
Device Info:
Device: Samsung Galaxy Ace 3 LTE (S7275R)
ROM: CM13-20160315build
Recovery: TWRP 3.0.0.0
Xposed: Xposed v80 sdk23 arm
Network Provider: redONE
Click to expand...
Click to collapse
I have exactly the same problem! Same ROM as well. Update to various CM13 releases, factory reset to stock kernel and rom but nothing helps.
I am currently in Italy using a Vodafone UK sim card, it's been working perfectly (apart from randomly dropping complete signal periodically) but now it's just completely died, as in it won't find a signal at all to connect to any network let alone data roaming. I have contacted Vodafone who said there's nothing wrong at their end and the worst thing is it was working perfectly till this evening. So now it sometimes says emergency calls only or just the ring with a line through it as it cannot find any signal at all. I have tried doing manual network operator selection and automatic but still nothing... Any ideas? It's a g9550 128/6gb
Update I now have 3g data but it says "no network connection" and I cannot send receive texts or phone calls, yet I have full data...
@nugget123
Consequences of buying a CN/HK variant....
They usually have network connectivity issues, not surprising. Try removing the SIM card, turning the phone off, wiping cache in recovery, insert the SIM card, and then reboot. Then manually go and search for a network in settings and force it to connect to Vodafone Italy, should work.
It's working now again, I didn't do anything lol it just started working on its own accord! I'm now in Switzerland and all is good. My life is empty without my phone
It always happens to me when abroad. I am on O2. I have to select network manually and pickup different to the one which auto connect shows emergency calls only. Looks like some cells allowing me to connect but won't pass through calls
Do you also have a usa/china variant?
No, o2 UK from Samsung
Samsung galaxy S6 edge (SM-G925F) showing full covarage on 3G or 4G but when you call the number is out of covarage.
on 2G get the calls without any problem.
Tried full flash with ODIN, cleaning connectors inside, change coaxial cables, nothing help.
I have changed many sim cards and different providers. Checked internet, MMS settings, etc. nothing helped.
I also rooted the phone in order to choose bands, but I'm not really sure about that.
Its really strange working perfect on 2G and once I change to Auto the result is this:
Icon 2G (Edge) - always can connect
Icon 4G always can connect
Icon H+ - sometimes connect
Icon H - can not connect
Please help me to solve that issue!
Million thanks in advance!
Hi
I'm having a strange problem with my new A51, with two SIM cards in it.
After an indeterminate time the phone disconnects from cellular network.
It still shows on to the both cards the signal strength, but the phone no longer receives calls or has internet access throw cellular network.
And if I call any of the SIM card numbers from another phone, I get a network message saying the phone is disconnected.
All other functions on the phone seams to be ok. Turning wifi on and off has no effect in reconnecting to the cellular network.
But... If I try to call from A51 to any other number, the phone reregisters on cell network, the call is done and from that point on, all goes to normal. I can receive calls again and access the internet using the cellular network...
I went to the store were I bought it, and the gave me another one, but with the exact same problem.
So I believe is not a hardware problem.
I believe now that It could be a SIM problem, on one or both SIMS, which is odd
A software problem on A51 the need's to be patched, which is odd because it has effect on the most basic feature of the phone, which is receiving calls...
A strange behavior of the phone with my cellular service provider, which is odd too...
I'm trying now with only one SIM to see if the problems happens too...
Can any one suggest any other test or debug to try to clarify this issue ?
Thanks
antoniomch said:
Hi
I'm having a strange problem with my new A51, with two SIM cards in it.
After an indeterminate time the phone disconnects from cellular network.
It still shows on to the both cards the signal strength, but the phone no longer receives calls or has internet access throw cellular network.
And if I call any of the SIM card numbers from another phone, I get a network message saying the phone is disconnected.
All other functions on the phone seams to be ok. Turning wifi on and off has no effect in reconnecting to the cellular network.
But... If I try to call from A51 to any other number, the phone reregisters on cell network, the call is done and from that point on, all goes to normal. I can receive calls again and access the internet using the cellular network...
I went to the store were I bought it, and the gave me another one, but with the exact same problem.
So I believe is not a hardware problem.
I believe now that It could be a SIM problem, on one or both SIMS, which is odd
A software problem on A51 the need's to be patched, which is odd because it has effect on the most basic feature of the phone, which is receiving calls...
A strange behavior of the phone with my cellular service provider, which is odd too...
I'm trying now with only one SIM to see if the problems happens too...
Can any one suggest any other test or debug to try to clarify this issue ?
Thanks
Click to expand...
Click to collapse
My wife have exact same issue with single sim.