Dual sim and signal lost - General Questions and Answers

Hi there
I recently bought an Alcatel 991d and replaced it a couple of times due to signal loss and sim freezing (no internet, sms, and calls on either the sims). I passed to a Samsung Y duos which is more stable although it seems to still have some signal problem (when this signals is lost it does not come back although a good coverage area is reached, 3g icon disappear and no internet surfing is allowed, sims freezing (rare). With the Alcatel other people experiences serious problems expecially under poor coverage areas and hypothesized the problem could be related to the continuous jumping from 3g to 2g cells. Actually my Samsung y duos goes nice and smooth when I only use the 2g network. Do you think that countinous jumping form 3g to 2g can cause problem to android smartphone in general? Can you think to a solution for this?
thanks a lot!

my friend have similar problems on Gigabyte dual sim phone (I forget model name). didn't found solution yet

Related

[Q] Signal strenght

Hi,
I' ve just bought a 820 and I am up to now happy with it ...
However I have the impression that the signal reception is quite weak; do you have a similar problem?
is OK, compared to BB and Desire S at the same place-
Thanks...
In fact at some "difficult" places I get only one bar (or even no signal - but rarely) while with my old Samsung I had practically always enough signal.
I had issues with signal prior to the update that went out today for my phone from Tmobile , now I have a good signal everywhere in my house. Can sit on the couch and text,web surf, and whatever else at high speed.
Murali Krishna
I have Nokia 820 and I also face problem of the signal strength fading out - call getting dropped and after a few seconds the signal comes back. Is there a solution for this.

Losing signal while switching 3G-2G-3G....

I noticed a big problem with the radio.
I live in an area where the 3G signal is not very strong, and it happens that the phone changes alone in 2G mode, then return to 3G when the signal is better..
It happens, however, that during these steps 3G-2G or 2G-3G phone loses the line, so that in that passage i'm not contactable if someone phone me, I realize that I get the SMS notification later.
I noticed that the indicator of the phone signal is reset, and I can not even call. As an indication of the lack of signal is about 4-5 sec
Someone said me there is the same problem on Moto G
With other devices like Galaxy S2 and Motorola Defy+, in the same place with the same operator and sim didn't happens...
toroloco73 said:
I noticed a big problem with the radio.
I live in an area where the 3G signal is not very strong, and it happens that the phone changes alone in 2G mode, then return to 3G when the signal is better..
It happens, however, that during these steps 3G-2G or 2G-3G phone loses the line, so that in that passage i'm not contactable if someone phone me, I realize that I get the SMS notification later.
I noticed that the indicator of the phone signal is reset, and I can not even call. As an indication of the lack of signal is about 4-5 sec
Someone said me there is the same problem on Moto G
With other devices like Galaxy S2 and Motorola Defy+, in the same place with the same operator and sim didn't happens...
Click to expand...
Click to collapse
This is normal, just probably the moto g is trying to connect to a multi-carrier 3G, which takes few seconds.Also switching between 3G and 2G involves dropping the current connection.
My advice in your case would be to switch to 2G entirely.
It isn't normal, aldo Motorola assistance said it…
Sent from my Motorola Moto X XT1052
other people wit this problem??
those days I'm trying with am other carrier(Vodafone) but even in my area has a stronger signal compared with TIM even with this I have noticed the same defect ......
however, during these tests, I may have discovered the cause and also the remedy of this defect, I still do some testing and will let you know
Thread already exists here
http://forum.xda-developers.com/moto-x/moto-x-qa/moto-x-xt1052-losing-signal-switching-t2711488
Thread closed

LTE Issues

Hi everyone, today I get my Galaxy S6.
Then I change my SIM card to my new device, the issue is that if I choose LTE/WCDMA/GSM, my S6 only have the less signal and 4G logo, If I choose WCDMA then I Have full signal with 3G, my SIM card was working well in my S4 with 4G before.
Thanks everyone, I Hope you can help me.
Hi
4G always gives much less signal than 3G unless you're very lucky. My LTE/4G gives 1 dot of signal generally, and was the same on previous phones.
Your S4 probably reported the signal bars differently, leading you to believe you had more signal than you had.
I wouldn't worry about it, it's not a fault.

Cellular Signal Constantly drops to no bars - UK - giffgaff SIM installed

Hi fellow Honor8 owners,
I have UK Honor 8 32GB model purchased from Vmall.eu/uk. I came from an iPhone 5S and must say I'm loving the device!
Only issue I have been having is constantly, the Data signal keeps dropping out and I am unable to recieve/send calls and texts. It completely drops out for a bit then comes back. This happens very often.
Is anyone else experiencing any similar issues? I have the nano SIM installed into SIM slot 1 .
I will maybe give the SIM a clean and reseat it into tray to see if there is any difference.
otherwise aside from that issue it's been amazing! One thing I'm really impressed is with battery, I am getting like 6 Hours Screen On Time on each cycle! and I'm not such a light user. Great for £260 unlocked!!
:good:
I also have giffgaff. This also happens to me mostly at home. I disabled Carrier Aggregation which seems to help, but it still happens sometimes.
I have the same and set the signal to be 2g only while at home, as I am using home wifi. I get many more bars when I do that and its good for calls and text only of course.
Its a pity we are not able to activity switch mobile data modes depending on our location without rooting.
scoobydu said:
I have the same and set the signal to be 2g only while at home, as I am using home wifi. I get many more bars when I do that and its good for calls and text only of course.
Its a pity we are not able to activity switch mobile data modes depending on our location without rooting.
Click to expand...
Click to collapse
So I tried cleaning and blowing in sim slot maybe debri but no still had the same issue. But then changed to carrier aggregation off, that helped a bit but still had issue often.
Finally resorted to switching to 2G for Calls and SMS only and I am mainly getting full signal strength all the time!
strange.. wonder if it is hardware issue or can be fixed via update?

Telephone signal bug?

Hello, I'd like to buy a X2 Pro, but while searching some reviews on the web I noticed that many users complain about a terrible bug which affects signal phone...
Precisely, in areas with weak signal, the phone goes to 2g network, and then you have to reboot to gain again full access to 4g/5g...
Others complain about calls closed suddenly during the talking.
Anyone with those problems?
I hope they fixed them with Android 11 updated.
It did happen to me once or twice while being literally in the middle of nowhere that the Oppo remained on 2G while there was 4G available, even though it was not very stable. At the same time the Samsung I use for work managed to keep up 4G nonetheless, and both phones are on the same carrier network (Telekom Germany). So I guess if you happen to live in a REALLY remote/rural area this might be a problem, but other than that I never noticed anything, same goes for calls being interrupted.

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