Dual SIM Issue - OnePlus 3 Questions & Answers

Hello there,
Im getting trouble to get the dual sim working properly.
First of all my setup : OOS 3.2.7, rooted, some xposed modules, nothing fancy. Stock kernel
SIM1: Data SIM, o2 germany
SIM2: Just used to receive some texts, all APNs deleted, Carrier : Orange/Sosh France
In normal usage SIM1 is deactivated. In this case everything works flawlessly.
As soon as I activate SIM2 i run into trouble. I loose data on SIM1 almost instantly and the only way to recover it is usually a reboot.
When i loose data the "LTE"/"H"/"3g"/whatever icon disappears, data is still on in the settings.
I noticed that at least once both sims were connected on UMTS when it occured.
Any clue to keep my data connection working when both sim cards are active?
Thank you in advance

Related

FreedomPop UK sim card

This was first flagged up by @ShootistUK on the Eragon ROM development thread but thought I would open a thread for it here as the other thread is getting long and is probably not the place to discuss this sim card.
Mine arrived today and I have spent many hours trying to get it working in my phones(Galaxy S3, Moto G 4G as well as the P8000) - I did manage to send and receive a text and make a call after installing their own messaging app(which they tell you to do) but so far have not managed to get data working at all despite it being basically a 3UK sim so it should use the same apn I would guess. I already have 3 other 3UK sims so am quite well versed in getting them working but so far the freedompop one has defeated me!
Hopefully ShootistUK will let us know if he has had any success(I doubt or if there is anyone else who has one of these sims please let me know.
Well, you have had more success than me. I fail to even get the application to work. It always gives me an error about using up all my premium minutes (or something similar) and to turn wifi off which does nothing at all to help. However I cannot get my 3-2-1 sim from 3 to work unless I make it the default data sim which pretty much defeats the object of having the sim in the phone alongside my vectone unlimited sim.
Hmmm, interesting - so your main sim is your vectone one(which is an EE mvno) - The problem with the 3 sim is that it cannot function in 2G mode and the p8000 doesn't allow you to run both sim slots in 3G mode so you are going to lose some functionality somewhere. What is your ideal setup by the way? I suspect it's not going to be achievable unfortunately...I am currently running my 3-2-1 sim as default for data/sms/calls and have a Vodafone payg as backup in case there's no 3 signal(so really for calls and the odd text too. I also have a tpo sim which I could use for backup but I don't think I can use the FP + 3-2-1 together and in fact can't even get the FP one fully working by itself. I may try again tomorrow in a different location in case it was a case of weak signal?? I'm sure I saw that error too but I'll see if I can replicate that issue again!
Well I have got both sims functioning at the moment by enabling default data sim as the 3-2-1 sim (but disabling data in the other menu so it doesnt use the data connection) and relying on wi-fi at home and work. At least this way I can receive and make calls/texts on both sims even though I can not use mobile data on the vectone sim and do not want to use the data on the payg sim. This is not in anyway a perfect solution but I suppose an issue with dual sim phones.
Yes, that's not ideal I guess but at least the vectone sim functions in 2G mode, I don't think it's possible to get two 3-2-1 sims working together.
Well I will now see if I can get my 3 pay monthly sim to work in the phone instead of the 3-2-1 sim using the same method. Just very annoying that they only work together if I have disabled data on the vectone and enabled and disabled the data on the 3-2-1 sim. Is there anyway to get the 3-2-1 sim and another sim working together with the data set to the non 3-2-1 sim? I like vectone for the price but willing to get another provider if I can get them to co-exist.
So you enable the data in the sim cards settings and disable in the data usage section, is that correct?
Simple answer is yes, make the 3-2-1 sim the preferred data sim and then disable the data in the data usage menu. Then both sims work for calls and sms. If i need mobile data I then make the vectone sim the data sim which turns the 3-2-1 sim off.
yeah that's a bit of a clunky solution but it's the only one that'll work unfortunately but you won't be able to get 2x 3UK sims working on 3G/4G at the same time I suspect...

Dual SIM Data issue: after reboot always on wrong SIM

Hey champs,
I got a strange issue with the swift. Last year I bought 3 Swifts for my wfe and kids. All of them equipped with two SIMs (1&1 for wired phone connections only, Simyo for cheap data flatrate and calls to mobile phone numbers). All phones have been upgraded to Android 6 so far. We use dual sim selector pro to do the call routing to the correct SIM, works like a charme. But regardless what I set in mobile data settings, after reboot the mobile data will always connect to 1&1 mobile networks (in fact it is vodafone) giving us one time a very high bill.
In the meantime I amended the vodafone APN to get rid of it, but this only leads to the situation, that after a reboot there is no mobile data at all. And since my son's phone is locked by funamo parental control, he is even not capable of swithcing mobile data by the settings.
Is there any chance to make the setting permanent? Is there any API call available, so I can get it managed e.g. by tasker? Is there an app available, that deals with data settings on dual SIM phones with Qualcom chipset?
Tnx in advance!
Glad to see I am not the only one with a problem, I live in Spain and use Orange SIM for data and voice, I also have a tesco voice only SIM which I use when in UK. Fine. I have exactly the same problem after a reboot or flat battery, "No Data Connection" when I check the settings it has changed to Tesco (which does not have data) Its only the data scource SIM that changes - voice and SMS remain as Orange. It is very annoying.
Same problem here with stock Android 6.0.1 Cyanogen OS 13.0-ZNH0EAS2NH and EE sims in slot 1 and 2... (one work and other personal).
Was thinking of returning phone, but apart from this problem, I really like it.
Latest Cyanogen OS update, (just installed), appears to have fixed my problem...
I updated, did a battery pull just for good measure, and with several restarts, the correct SIM appears to be selected each time.

Strange problem with dual SIMs

Hello
I tried flashing my p8000 but i was not careful and did not flash correctly. I had problems with TWRP and ROMs.
I spent a lot of hours making things work and i finally i got a stable TWRP with a stock ROM working. Problem was that i lost both IMEIs and could not use the SIMs.
I started searching for solutions (chamelephon, MTK Droid Tools) but nothing seemed to work. I came across a post stating to sent specific commands from android terminal and i finally managed to make the phone showing the 2 IMEIs.
So far so good but again i cannot make both SIMs to work. Only the SIM that has cellular data connection is working. If I switch data to other sim card, the previous sim stops seeing network and second sim is working.
Anyone has any idea?
Cheers
ps. Also, not sure if I am correct or this has to do anything at all, the MP0B_001 file is stored in the path /NVDATA/NVRAM/MD/NVRAM/NVD_IMEI/MP0B_001 from the root directory (NOT root folder) and not in the path ROOT//NVDATA/NVRAM/MD/NVRAM/NVD_IMEI/MP0B_001 as stated in a guideline.
Hi, you can only use one sim on 3g/4g and the second on 2g. I had the same issue in the UK. For example the Three network sim only works with 3g/4g connection as this is the requirement of the network operator. I have 2 of their sims and only one can be connected to a 3g/4g network and the other does not support 2g therefore gets no signal. For your case if one of the sims can operate in a 2g network then assign the 3g to the other and the 2g on this one.

Phone looses 4G Data & Call function on turning off data. APN Settings auto deleting.

Phone looses 4G Data & Call function on turning off data. APN Settings auto deleting.
Hey, I bought a Nokia 6 2018 a couple days ago. Its great but has this one problem. I am using the Indian Model TA-1089.
I have 2 SIM Cards, one is by carrier JIO and another by TATA DOCOMO. I use the JIO SIM as prefered SIM for Data, Calling and SMS. When I put the JIO SIM in SIM Slot 1 and start the phone, it works uptil I turn off Data. Once I turn off Data and let the phone sit for a few mins, the next time I turn on Data the phone doesn't latch onto 4G connection and I don't get internet connection. Also, I cannot place any calls via the same SIM. When I try to place a call, I get a popup saying "Mobile network not available". Although I can receive calls for some reason.
While trying to find the cause of the issue I found out that when the problem occurs, the APN settings are automatically deleted from settings. If I try to manually add APN Profile with the correct values and try to save it, the profile doesn't get saved at all. Also, resetting the APN does nothing.
I tried resetting the network but the problem persists. Factory reset didn't fix it either. Tried another 4G SIM and the same problem occured with it.
Restarting the phone fixes the issue temporarily. So does deactivating and activating it. But its such a hassle.
Surprisingly when I put the JIO SIM in SIM Slot 2, it worked flawlessly. But it still doesn't mean the SIM slot 1 issue is fixed.
Has anyone else had this issue? Please help.

Mobile data not working after switching from wifi

Hi guys just got redmi note 8 pro and almost every time I go out of reach of wifi my mobile data doesn't work. It happens also if I manually tuen off wifi. I have the H+ icon like it is connected but I don't have data connection. The issue is resolved if I go in and out of airplane mode then I have data connection again. If I just turn off and on data connection in the quick settings it does nothing. APN settings are set and working ok.
MIUI global 11.0.3.
did u find any solution.....
if you are using any 3rd party VPN or using custom DNS then please disable them and try again.
I had the same issue. I emailed Xiaomi's support and also posted it in the Mi community forum. Followed everything (except factory resetting the phone) but nothing was working.
Finally, I was able to find a solution that has fixed this issue for me (I've spent almost a day and haven't experienced it yet).
I was using a single SIM card on my phone. My SIM card only supported 3G network. After trying all the solutions, I grabbed another SIM card (of another network provider) and put it in the second SIM slot. This new SIM card also supports 4G LTE.
At this moment, my phone has 2 SIM cards. One supports only 3G and the other also supports 4G LTE. Though my default mobile data is still set to my original SIM card (3G).
After using two sims simultaneously, I've not experienced this issue again.
So I assume that Redmi note 8 Pro has a bug that doesn't allow mobile data to work properly if there is a single 3G SIM card present in the phone.
I have the same issue.
Works for sometime then suddenly no internet even when it's showing 4G+ sign. I have to turn off the data then on again to get it working which is annoying.
Same issue even with dual sim installed.

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