Develop Bugs

[Q] Network Connectivity failure (Dual Sim)

Hi All,
I face a network discontinuity in my GRAND when both the SIMS are active. Calls and messages are not connecting properly sometimes and had to know only when our friends inform us, Facing this same problem in Galaxy GRAND/QUATTRO/S Duos..
What is the use in marketting it as a dual sim mobile when all the dual mobiles facing this problem.
Is there any resolution for this problem?

I am facing the same issue too,may be the latest 4.2 firmware is causing the problem. While using the Data services I am unable to receive calls most of the time.

I had this problem from the initial firmware 4.1.2 as well. Low quality mobiles like mmx, karbonn etc works good with dual sim feature but not samsung

Please check your SIM cards, they may have dirty or worn out connectors. If that is fine, then check your settings. You can set up the phone for dual standby or dial active or data on one SIM and voice on the other etc. Limitless choices that are not available on non branded phones. I have used the Grand in 4 countries now when I travel and across more than half a dozen service providers. Have never faced any connectivity problems on the stock Rom both 4.1 and 4.2
Sent from my GT-I9082 using xda app-developers app

samsung galaxy grand duos
I bought a new sim then too I am facing this problem. I tried sim of another operator, the same problem occurs. I tried setting one sim as GSM only and other as WCDMA only. Then too problem occurs. Actually, the sim which has 3G plan activated has no issues. Problem occurs on the other sim. I have activated dual sim active as well. I have deactivated data on the phone and I am monitoring and seeing no issues till now. But this is not a solution as if you buy a smartphone and cant use it for 3G it is of no use. Please guide me on this issue. This is frustrating me..

Bought g2 on sept 14 from the 5th day it s having network connectivity issue..cant use 2 sim..if only one sim is putted not much pblm..wen goin on 2 sim..network wont connect..irregular network..useless smartphone..no value for money..shame on samsung as other less price mobile phones has no problems at all..i request samsung to take back all grand 2 having these issues..

[Q][ I9192 S4 mini duos ] Does the speed of 3G the same on both sim slot ?

Hello,
I have my S4 mini duos for now 3 weeks, and I'm experiencing a very bothering issue.
When I use the 3G of my second sim card, the maximum bandwidth is around 1Mb/s, but If I put the same sim the minute after in the first slot, I end up with a 7Mb/s speed which is almost the maximum my provider offer.
I also check with several application like network details and the connection on the second slot sims to be locked in GPRS mod while the status bar show a 'H' next to the network bar.
Is it my phone not working or the correct behaviour( in my opinion not normal at all when mediatek is able to do that for a couple of year now ).
Chears and happy new year

Yes, same here. Second sim hsdpa+ is max 1.3mbit/s.
Sent from my GOCLEVER using Tapatalk 4

jarmal said:
Yes, same here. Second sim hsdpa+ is max 1.3mbit/s.
Sent from my GOCLEVER using Tapatalk 4
Click to expand...
Click to collapse
Thanks,
I will considering saling that $$$$$$ phone now.

Sim Card Data Issues -- Data is only supported on SIM CARD #1

Well, this may be common Knowledge to you Dual Sim card veterans. But I have been killing myself and Tech support for the last week trying to get 4G working on both Sims #1 and #2. I guess we would literally need the guts of 2 modern 4G LTE radios in there with all the bands for each Sim slot.
It's relieving and at the same point disappointing that I can't compare data services with the sims inside the phone at the same time. It makes sense now. I was thinking how can this thing have decent battery life if it's running 2 full sims.
Hopefully this will save some folks some hair pulling data only supported on SIM# 1 and voice only on SIM #2.
So far have been testing the following carriers since I have just recently unshackled myself from sprint!
- T.mobile
- Rok Mobile (33.99 unlimited everything if you pre-pay $399 for the yr. But will they be around for a yr???)
- Ting - pay as little or as much as you need...
- Harbor Wireless -- business plans but they support unlimited music streaming via T-mobile.:good:

i thought zenfone2 would be nice for t-mobile + traveling abroad. so the tmobile sim would have to be in sim slot 1 to get the free data (capped at very slow rates, but free and unlimited). then use the local sim in slot 2 for voice (since tmobile doesn't let you call for free with their global roaming). but sim 2 is GSM only right? no 3G/4G, so i wonder how reception will be abroad being 2g only vs 2g+3g.

You mean that if i have on sim1 data and voice and on sim2 only voice there cant work silmultaneously?

yes, you can have data and voice on sim1 and additional voice on sim2. It would be pointless to pay for 2 data sims, but I understand why you would want it. But in this case, its data on sim1.

kazuken said:
i thought zenfone2 would be nice for t-mobile + traveling abroad. so the tmobile sim would have to be in sim slot 1 to get the free data (capped at very slow rates, but free and unlimited). then use the local sim in slot 2 for voice (since tmobile doesn't let you call for free with their global roaming). but sim 2 is GSM only right? no 3G/4G, so i wonder how reception will be abroad being 2g only vs 2g+3g.
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Hey All,
I got the Zenfone2 yesterday.
I noticed that the mobile data/Cellular data works only on SIM1. I searched and found no option to enable data on SIM2.
Even if we have data services enabled on SIM2 it if no use as they do not work in SIM2.
Will there be any workaround / Fix for this ?
Is it a zenfone 2 design constraint ?
Regards,
Niri

Hi all,
I have notice that only SIM1 is 2G / 3G / 4G, and SIM2 is 2G .
But I don't unterstand why I cannot receive MMS on SIM2 .
This is very boring, and I'm not sure I'll keep this ZenFone2

Technology Limits
thetof said:
Hi all,
I have notice that only SIM1 is 2G / 3G / 4G, and SIM2 is 2G .
But I don't unterstand why I cannot receive MMS on SIM2 .
This is very boring, and I'm not sure I'll keep this ZenFone2
Click to expand...
Click to collapse
2G for the Zf2 would be enough for MMS (slowly, with 300k images), but SIM2 can't support a data network. I'm pretty sure it was needed for the same reason Windows Boxes can't handle two different internet connections (one connection gets used, the other ignored).

nickel911 said:
Well, this may be common Knowledge to you Dual Sim card veterans. But I have been killing myself and Tech support for the last week trying to get 4G working on both Sims #1 and #2. I guess we would literally need the guts of 2 modern 4G LTE radios in there with all the bands for each Sim slot.
It's relieving and at the same point disappointing that I can't compare data services with the sims inside the phone at the same time. It makes sense now. I was thinking how can this thing have decent battery life if it's running 2 full sims.
Hopefully this will save some folks some hair pulling data only supported on SIM# 1 and voice only on SIM #2.
So far have been testing the following carriers since I have just recently unshackled myself from sprint!
- T.mobile
- Rok Mobile (33.99 unlimited everything if you pre-pay $399 for the yr. But will they be around for a yr???)
- Ting - pay as little or as much as you need...
- Harbor Wireless -- business plans but they support unlimited music streaming via T-mobile.:good:
Click to expand...
Click to collapse
This is the most disappointing thing I found after getting my phone. I wanted to use SIM 2 as a backup data service when SIM 1 wasn't working. :|
I hope this is a software limitation and either Asus can push an update or we can do something with custom ROMs.

I dont really see the point on having 2 sims for data. Honestly.

I have reported this issue to Asus .

I called Asus support and the support guy told me I need to do a system update and sent me this link in email. This update is valid only for WW SKU, so if you are using something else call your local support.
I'm trying to update, but I'm not sure how to

I think you can told this a dog too ? like most other support, they don't know what user want. This is the normal update site and has nothing to do with data for 2. Sim port.

tasar said:
I think you can told this a dog too ? like most other support, they don't know what user want. This is the normal update site and has nothing to do with data for 2. Sim port.
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Click to collapse
Well the changelog for the update as seen on ASUS website does have a mention for this.

I can't see anything in changelog, that the have implemented data to Sim 2. Or I have tomatoes on my eyes ?

tasar said:
I can't see anything in changelog, that the have implemented data to Sim 2. Or I have tomatoes on my eyes ?
Click to expand...
Click to collapse
I read it wrong :|

When I boght my Zenfone 2 it was stated on the site I bought from that sim2 was voice only... I believe this is how it is supposed to be.
Otherwise phone would be bulkier and a cost a heap more...

MrKoji said:
I dont really see the point on having 2 sims for data. Honestly.
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Click to collapse
the main problem is that you can't receive (or send) MMS with SIM2.... only call and sms
All other dual sim allows MMS with both SIM cards

Yes, while its not a major issue for me personally, I'm surprised that my much cheaper old Acer could handle this OK. The second SIM only ran 2G, but that was enough...I'm surprised there's NO data on the second SIM for the Asus.

thetof said:
All other dual sim allows MMS with both SIM cards
Click to expand...
Click to collapse
All other dual SIMS? Not my previous Samsung Duos, nor, as far as I am aware, any of the DUOS range.
It would be nice though.

from my knowledge, dual sim dual active does not have data on 2nd sim slot
and dual sim dual standby, most of this supports data on both sim slots

Aircel 3G Not working with Redmi 2

Sir
I am a Redmi 2 user, I was using Idea 3G with my Redmi 2 with there maximum speed.
Since aircel has plans that suites my need i switched from Idea to aircel.
Now i am facing some problems with my phone, when I connect to internet its showing H+ but the maximum speed id 45 kbs.
So I contacted aircel they said me to check the Sim with another phone.
I tried Samsung S4 mini, the speed was 2.5 Mbs.
so there is no problem with aircel Sim.
And I tried Using Airtel 3G with Redmi 2 speed was 2.5mbs, so there is no problem with phone.
But when i put aircel Sim in Redmi2, the maximum speed is 45kbs.
is there a way to solve this issue?
I tried wipe Cach, and I also installed the latest version of MIUI offline (Manual installation)
Please Help me as soon as possible

Hi. I'm also using aircel (3g) sim only but I have good speed. If u says that other operators work good means this should be ur sim problem. Try to use the sim in next slot. If the problem still exists try to change the sim (buy a new one in same old number).. There r some problems which can't be rectified.. We have to find some solution by spending some bucks from our pocket.. I too have this problem with a bsnl sim.. I changed it and worked flawlessly...
Sent from my 2014818 using XDA Free mobile app

Ya sure But this SIM works fine (800Kbs Download Speed) At other phone and my netsetter.
So i don't think its about the sim, may some bandwidth issue with the phone.
do you know how to change bandwidth?

Straight talk verizon sim and switching phones

Well I started out with a Note 3 broke it got another Note 3 and now upgraded to the Note 4 all verizon models all using the same straight talk verizon sim.
Service works on the note 4 BUT am limited to 3G. After talking to a few techs they finally told me I need a new sim card. They don't allow switching phones and keeping a single sim.
They are sending a new sim free of charge so at least that's a good thing. Just that I would put this info out there in case anyone else does that same as me and think you can just move the sim card and be good to go.
Sent from my SM-N910V using XDA-Developers mobile app

Hi, I just wanted to let you know that I switch my straight talk sim card between 3 different phones and never have a problem. One is my ZTE Lever (Straight talk phone), The second is motorola E2 (which is a verizon prepaid phone), and finally my galaxy note 4 ( which is a verizon phone). Everything works great with no problems at all anytime I switch. Maybe it's your apn settings.

dhplap said:
Hi, I just wanted to let you know that I switch my straight talk sim card between 3 different phones and never have a problem. One is my ZTE Lever (Straight talk phone), The second is motorola E2 (which is a verizon prepaid phone), and finally my galaxy note 4 ( which is a verizon phone). Everything works great with no problems at all anytime I switch. Maybe it's your apn settings.
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Click to collapse
Well on a stock 6.0.1 verizon note 4. I can't touch apn settings. Second I have only the imei of my first note 3 associated with my current sim card. I have service but not LTE. My wife has my second note 3 and I associated the imei with her sim and she gets 4g LTE no issue where I would only get 3g when I used it.
Straight talk won't fix it without a new sim. Which isn't a big deal. Order 2 sim kits from walmart for 2 bucks and will have them in a few days.
Sent from my SM-N910V using XDA-Developers mobile app

My s5 was like that. No other sim would work the 4g. That went for the sim in my s5 wouldn't work other phones 4g either (including other s5s). Now I have my sim from 3 note 4s ago and it works fine(broke one, got a bad one and now have a new one). I can also swap sim cards with my son's s4 and it works just fine. Guess some phones are just weird...

efanatic said:
My s5 was like that. No other sim would work the 4g. That went for the sim in my s5 wouldn't work other phones 4g either (including other s5s). Now I have my sim from 3 note 4s ago and it works fine(broke one, got a bad one and now have a new one). I can also swap sim cards with my son's s4 and it works just fine. Guess some phones are just weird...
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Click to collapse
Yeah. I have issues getting this note 4 rooted so I can unlock the bootloader. I don't have a computer and only can borrow for short times which doesn't help.
This note 4 also locked me out when I put the new sim in. I never setup a pin number so couldn't unlock it and it totally erased everything even my SD card which I put back in after finished setup again. Very strange but at least I didn't lose anything. Always doing backups. Seriously want root now so I can do full restore.
Sent from my SM-N910V using XDA-Developers mobile app

My ST VZW works flawlessly after coming from an m7

Verizon can be touchy. Even when I wasn't using StraightTalk, but was on Verizon proper, I've had to replace my SIM to get 4G. Apparently they can get screwed up pretty easily. That being said, at least on VZ proper you should be able to swap SIM cards between phones easily.

Well both my wife's note 3 and my note 4 have 4g again on ST vzw. Which considering where we live is a minor miracle by itself. Went on a small drive 3 phones all vzw service. IPhone lost signal a lot, S5 a few times. My note 4 just once but it was a deep valley with lots of power lines crossing the road. Vzw service is the only service either from vzw or ST. No others even remotely work in this area. Living in the lakes region of New Hampshire in the middle of mountains might be nice views but is terrible for radio waves.
Sent from my SM-N910V using XDA-Developers mobile app