Hi guys, noob here, just got my first android phone (been with blackberry till now).
I got a chinese X12 dual sim phone because i really needed only 1 phone (had to carry around 2 of them).
Phone works great, only problem is with the mobile networks. It can connect to GSM networks but it won't connect to a 3G network. The phone has 3G capabilities, 3G is enabled for the required sim, it finds the 3G network but it will not connect to it.
Sim works fine, had it in a Samsung i900 on 3G (WCDMA) - i live in Europe.
The thing that surprises me most is that the phone came with android 4.0 instead of the 2.3.6 it was advertised, could this be the problem?
Data Enabled ?! have access points ?!
Taki2011 said:
Data Enabled ?! have access points ?!
Click to expand...
Click to collapse
yes, data is enabled on it, as for the access points it has them too (althought i am only trying to connect to the voice network, not the data network)
Tried one more thing which is wierd: the phone works ok with another 3G sim from another provider, but with the other sim it doesn't connect (but it finds the actual network). And the sim that won't connect works on my old phone (the samsung i900)
The first sim that works on 3G on my new phone is from Vodafone (and they have both GSM and WCDMA in my country), while the other sim that doesn't work is from a provider that only has 3G (for both voice and data).
Quick update:
i found out i also get an "error" : invalid IMEI for both sims - it was this way when i first got the phone...
really strange thing with this phone, in settings > about > it says android version 4.0 but when it starts it has the honeycomb logo...
would appreciate any help, if it's from the missing imei's that would be good (or bad, depending on how hard is that to fix).
You can call ##778# to get into those settings. But be careful, those can really screw up your phone if your not careful.
The only reason i can think of, is if your phone only supports certain UMTS bands, while your operator is using different ones. Check out this article: http://en.wikipedia.org/wiki/UMTS_frequency_bands.
For example, my previous phone HTS Nexus One came in two versions - one for ATT(UMTS 850/1900/2100) and another for T-Mobile(UMTS AWS/900/2100). Both were GSM, both had 3G, but 3G would not work on another operator.
alexander7567 said:
You can call ##778# to get into those settings. But be careful, those can really screw up your phone if your not careful.
Click to expand...
Click to collapse
Tried it. What i get is : USSD code running (for a short while) > unknown application
AntonC said:
The only reason i can think of, is if your phone only supports certain UMTS bands, while your operator is using different ones. Check out this article: http://en.wikipedia.org/wiki/UMTS_frequency_bands.
For example, my previous phone HTS Nexus One came in two versions - one for ATT(UMTS 850/1900/2100) and another for T-Mobile(UMTS AWS/900/2100). Both were GSM, both had 3G, but 3G would not work on another operator.
Click to expand...
Click to collapse
phone has only WCDMA 3G network - i tried it on different carriers (on 3G and not GSM) and it works fine, connects to 3G, it just won't connect to this specific network (although it finds the network there, so i guess it has the hardware to connect to it).
could this be from the lack of the IMEI ?
FIXED !!!!
Got it fixed, the problem was with the missing IMEI codes, put them back in, works like a charm.
I used the tutorial here:
http://club.dx.com/forums/Forums.dx/threadid.1004466?page=2
Thanks for all the replies you guys.
in a first moment, the carrier signal was ok, but data wasn't working. so i called the carrier, get the correct APN, and the everything was fine for 5 minutes, for phone calls, data network. But suddenly signal was lost, and never got back. Factory reset, the signal bars still off, with an X. Tried to locate the carrier manually, but it doenst work. What can I do now? I will try another sim card to check if it works. How do i know the phone is carrier locked?
If its the AT&T version (presumably, since this is the AT&T variant section) it should carrier locked, unless you obtained the unlock code; or otherwise purchased it SIM unlocked from a 3rd party vendor.
On the other hand, if you were able to connect to the network at all, it is probably not carrier locked. Likewise, if it was locked, it would ask for the code when you inserted the SIM.
I think something else is going on. Even if it as SIM locked or bad SIM, I believe it should still read the network as being present. It would just not let you connect to the network.
Although, replacing the SIM is an easy and cheap thing to try. At least to eliminate it as the issue.
Hello,
I bought this phone in Malaysia @ Lowyat PLaza.. Paid RM1099.. The Hyundai Multicav Q5L+ has good features & worked Ok in MY using the MY SIMs but when I moved to India (Chennai) it stopped working. When I put my India SIM (Vodafone) and the MY SIM - Tunetalk (it's a dual SIM phone) neither of the network signals seems to pick up. Note, the phone does display that its a Vodafone SIM, Tunetalk SIM etc. but no signal and there is a "cross" displayed next to the signal bar. I tried selecting the network manually but that didn't help. When I contacted the MY vendor (who sold me the phone) he said something about the IMEI range registered on the phone being different than the one in India and hence the phone needs to be patched. Apparently it can be done by some of the service center shops locally. When I went to a few of them, they took a look and couldn't figure out how to fix it for this brand of phone. Note, both the SIMs (incld the MY one which is on roaming) work perfectly well with my old phone which I had purchased in India. So nothing wrong with the SIM cards or the networks in general but something to do with this phone. Any help will be appreciated.
Hi XDA community,
Few months back i had purchased LG G Flex 2 for my dad who is a reliance CDMA subscriber and was looking for a decent phone which is hard to fimd in india.
i had bought a phone from a guy who specializes in imported cdma phones.
Everything was working fine till end of April, 2016. We had received a message from rcom saying they upgrading all their cdma customers to 4G. So we need to get a new sim from reliance store.
So i was worried if my dad's phone would work on gsm too or not?
So i tried to put the GSM sim in the phone and check if it works as the phone supports both gsm and cdma.
so this is what i did,
1. in mobile network selected gsm/lte and removed the sim card which in turn automatically rebooted the phone.
2. while the phone rebooting i swapped my cdma sim with vodafone gsm sim.
3. the phone received the signal and i was able to make a call. i was delighted.
4. now i selected the cdma/evdo option in mobile network and followed the above process and re swapped with reliance CDMA sim. But to my surprise the phone shows "Service Disabled" , whereas same CDMA sim worked fine with my CDMA only hanset.
Also, i was not able to check the network option as the phone disabled the Mobile Network option.
5. Now i tried with another reliance CDMA SIM and swapped with the actual reliance CDMA SIM. The phone showed the signal and I could make a call.
6. Again i reswapped the new Reliance CDMA sim with my vodafone gsm sim. To my surprise the phone was showing "Service Disabled", whereas it worked fine on gsm only phone. So i also tried with the reliance CDMA sim that had worked and the phone said "Service Disabled". In the whole process of swapping reswapping and juggling between so many sims, I forgot what option was last checked in mobile network.
7. this strange behaviour seems as if the phone is accepting the New SIM and rejecting it once swapped reswapped with something else.
NOTE :
1. Phone when purchased was already rooted having the following app already installed 1) root browser, 2) supersu 3) shortcut master(lite).
2. Phone is on android Lollipop and software info says LS996ZV7
3. The phone backcover says LG U+LTE x8, and i m not sure if its a sprint variant.
I am trying to search web since last 3 days on the issue but nothing is helping.
Its my dads business phone and he yelling at me for screwing it. He is using an alternate phone for time being but I wanna resolve the problem at earliest.
Hi,
I'm in South Africa and I bought a SM-G991U1 (US unlocked version) on Amazon Renewed and everything works fine except for mobile connectivity.
I get the "Your phone's not registered on a network" message if I try to make a call and mobile data does not work.
I've tried:
- Resetting network settings
- Manually setting APN details
- Tried a few other SIMs from different carriers as well that work in other phones
- Checked IMEI info, doesn't seem corrupted or 'null'
I suspect that the modem firmware or something else is region specific to the US on this model and not working on South African networks as the phone does support our network bands according to GSMarena.
Would it be possible to re-flash the modem firmware or fix the issue some other way?
Hello I'm having the same problem, have you find any info about it?
Not much, I went to a carrier store and the phone seemed to work alright there after rebooting the phone with the sim card installed. I am starting to suspect that the phone doesn't like my closest cell tower maybe? Or possibly doesn't like using another carrier's mobile tower?
No idea.
I've since bought an identical but South African version of the same S21 which works flawlessly.
As a quick rant for anyone considering buying from Amazon: I tried to return the phone, shipping it back to the US and everything, only for Amazon to refuse to pay the import duties on it once it arrived, forcing DHL send it right back and charging me for it again