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[HELP] Problem with dual-sim firmware

Hello everybody!
I'm a user of Lenovo A536, and soon i decided to customize it. So i wanted firstly to install fresh version of stock. My phone is single SIM version, and after few hours of googling it looks like there is not singe SIM version firmware available for download. I tried about 5 different versions(last digits of releases):
*910
*725
*141115
*813
and maybe one more... And all is Dual-SIM.
After installing DS Stock ROM, everything seems OK, but, there is network issue. I'm available to use just GSM(2G) networks. My default SIM is SIM 2, not SIM 1 where WCDMA(3G) is setted by default. (Why is this really important to me: most of a day, i'm not at home, so slow network is like i don't have it. ) In SIM Managment there is no another SIM. Just SIM 2, and when i click on it, there is two options, SIM 2 and "off".
What have i tried more:
CODES
I have tried to dial *#*#4636#*#* but, i got two phone infos(Phone info 1 and Phone info 2) and "radio off" is not working as changing mode, on both of it.
Build.prop
I have looked what is seeking there... I saw option something like "...active.sim..." and it has value of 2, and i set that to 1, but that caused bootloop after rebooting....
APPS
I have downloaded some SIM Managers and try to enable/disable SIM 1, and to set 3G to SIM 2, but that was unsuccessful also.
Is there any way to change some system file which contains these settings, to disable one SIM, or just to change SIM 2 to SIM 1?
Or can you find correct singe SIM ROM?
I'm currently on MIUI 8.
Thanks to everyone for attention.
(I'm sorry to MODS if i have posted this thread on wrong place, or named it incorrectly)

OnePlus 7 Pro on Visible Wireless

Can anyone help me get my One Plus 7 Pro working on Visible wireless. I know the phone isnt officially supported by Visible yet, but there should be a way to get it to work. Even if i can just get data only to work on the phone that would a good start.
I am willing to try any modifications that may need to be done.
Thanks in advance.

so maybe first i should add, i get this message when sim is inserted "sim 1 no provisioned" but the sim works in my iphone x fine

Have you tried updating carrier settings? Also the Visible Wireless app must be installed as Activation happens through the app on Android.

I have the app and I can't update carrier setting when the Sim card keeps says not provisioned

Technically there is no reason why it should not work. Visible uses the VZW network. The issue is they can exclude devices and you won't be able to get it provisioned.

Were you ever able to successfully get the OP 7 Pro working on Visible?

It's A Go!
Ask and you shall receive! Latest update adds Visible Wireless support for the Oneplus 7 Pro.

Dual Sim Card on Verizon Model?

Hello,
So trying to continue to troubleshoot my original ticket "Unable to Make Calls", I decided to browse through the hidden menu via ShorcutMaster to see if I can make changes to the network and hope for a resolution.
Anyways, I ran into the Qualcomm QMMI Diagnostics App which checks the sensors, network capabilities, Backlight and such. One interesting thing I noticed when playing with the menu was the option to check for Sim Card 1 \ Sim card 2. On a hardware level, they both check out. But in the settings to test "Tel SimCard1 \ Tel SimCard2", I was able to get the Tel Sim 1 working by dialing out (hardware confirm) and when selecting TelSim2, the message "Sim Card is Disabled". (Just for note, the Humidity Sensor Check came back as "Not Supported").
Also note, when looking for Network changes to be made, the menu option for "DualSim" is available but hidden as well.
So is it possible later on when we get the Cross flash thing working, is it possible to cross flash the Dual Sim Firmware and hopes to have both enabled?
Please poke around to see what else there is.

Cant get the pics to uploads, so check it out here:
https://ibb.co/rZCM1rJ
https://ibb.co/bF62Tpr
https://ibb.co/173Sq79

Have you tried loading 2 SIMs and seeing what happens?

No because it shows disabled via hardware. But really, it's because I don't think people sell the dual SIM slot part for V50.

joeminati said:
No because it shows disabled via hardware. But really, it's because I don't think people sell the dual SIM slot part for V50.
Click to expand...
Click to collapse
Maybe this will fit. It's from the V40
Replacement SIM Card Tray Slot Holder for LG V40 ThinQ / V40 V405UA Black https://www.amazon.com/dp/B07WRQJT5V/ref=cm_sw_r_cp_apa_i_eGgXDbJANV5N5

Update broke APN... Anyone know how to downgrade?

After the update, my second sim that I use for data stopped working... The APN settings are acting funny, sometimes they disappear and what not. I have to use a custom APN for my second (data) sim because by default the phone thinks it is verizon, when in reality it needs the straight talk vpn (TRACFONE.VZWENTP) for the data to work. This worked great out of the box, but since the update, the second sim won't work at all.
Can anyone think of a fix for this or more probable, does anyone know how I could downgrade to the previous version back to the version that worked? I checked the oneplus website to see if it was in software downloads, but there is no section there called oneplus 8t
Thank you in advance.

SMS not sent in Poco X3 (karna) (Indian version)

Heyy Guys,
I'm creating this post after facing terrible issues and embarrassing situations because I can't send sms from my Poco X3. It's a new phone and barely a month old, and I've tried uninstalling updates for career services app, Google messages app rebooting the phone and what not!! Still rarely on some lucky day I can send sms and rest of the time I can't..!! It's really frustrating when you need to do online payment and need to send a verification text..!
Thankfully @Dandito from XDA forum replied to a thread for another poco phone and he said that
"The problem is existing only when the VOLTE service is enabled. Try to move on 3G only or just stop Volte under 4G and it will be ok. Unfortunately Xiaomi are using some specific technology for volte sms sending and the your network provider does not support it. The phone is trying to send SMS through SS7 instead of SIP protocol when VoLTE is enabled. I'm trying to find a hidden menu where I can eventually switch or choose a protocol but without success."
This fix worked for me miraculously therefore kudos to him for finding this..!! Respect+++++++ for this guy!!!
Now if anyone can find a fix for using volte and sending sms at the same time then please please do reply to this thread!! I'm trying my best to find a solution but your help would be great too!!
I did some tests and I have new findings..! Please hear me out!
I can't send sms from my sim in poco x3 when volte is on!!! And when it's off then also rarely it works... sometimes I can't receive any otp on this phone!!
Do note that this idea 4g sim works perfectly and can send and receive sms in my realme 1 with volte on !
Now other sim cards work perfectly in my poco x3!! I tried everyones sim in my house and it worked fine..!!
Now if I complain to idea people then they'll say that it works well on another phone so please complain to phone company..!
And if I go to poco then they'll say that change your simcard as other sim works fine!!!
I'm genuinely tired and frustrated and I get heavy embarrassed while making online payments and imp work stuff!! Sending and receiving SMS is fundamental and necessary and this is barely a month old device!!!
Guys any suggestions would be heavily appreciated

I use Volte on both my SIMS and send SMS normally. Jio and Vi (Vodafone Idea).

Alrich said:
I use Volte on both my SIMS and send SMS normally. Jio and Vi (Vodafone Idea).
Click to expand...
Click to collapse
Lucky man..!! But wait! Which rom do you have?

krutangdesai said:
Lucky man..!! But wait! Which rom do you have?
Click to expand...
Click to collapse
Regular stock ROM that came with my phone.
MIUI 12.0.8. Are you sure this is an actual problem that exists or something wrong particularly with your device. I haven't heard of anyone having this problem of being unable to send SMS while on VoLTE. I have multiple devices and multiple providers and they work fine on all of them too.

I did some tests and I have new findings..!! Please hear me out!
I can't send sms from my sim in poco x3 when volte is on!!! And when it's off then also rarely it works... sometimes I can't receive any otp on this phone!!
Do note that this idea 4g sim works perfectly and can send and receive sms in my realme 1 with volte on !
Now other sim cards work perfectly in my poco x3!! I tried everyones sim in my house and it worked fine..!!
Now if I complain to idea people then they'll say that it works well on another phone so please complain to phone company..!
And if I go to poco then they'll say that change your simcard as other sim works fine!!!
I'm genuinely tired and frustrated and I get heavy embarrassed while making online payments and imp work stuff!! Sending and receiving SMS is fundamental and necessary and this is barely a month old device!!!
Guys any suggestions would be heavily appreciated

Well since your steps of troubleshooting have failed to reach a singular conclusion, I have a feeling that something got messed up during original pairing of your phone and that particular SIM card.
One test says your phone is fine because other SIMS do their job just fine.
Other test says your SIM is fine because if you put it in another phone and they do their job fine.
Which leads me to one conclusion. There is some kind of pairing glitch with that particular SIM and your phone.
I have only a few suggestions. And you might want to do them ANYWAY.
1: Go to Idea (now Vi) showroom, ask for a replacement SIM. You don't need to explain to them why you need it. Just say it doesn't work or it's scratched. Don't tell them about it working on other phones etc. New SIM costs around 30 - 100 depending if they follow official process or want money in their pockets. Activates within 4 hours with the same plan but OTP will not work for 24 hours.
2: In the meanwhile or if you can't get a replacement SIM use Isopropyl alcohol and clean the current SIM you have.
3: Factory reset your phone WITHOUT your SIM inside and set it up fully without the SIM. (Make sure you remove your Google Account before the Factory Reset.)
4: Last if all else fails. Take your phone to Mi Service Center and make up some stupid reason and ask them to flash your phone. Tell them you have already Factory Reset (3 times 4 times etc) and that it didn't work. By default they automatically will jump to Flashing it, no questions asked.
They will also flash a version of MIUI around 1 or 2 versions behind current version.
All the best and please update after trying these steps.

Alrich said:
Well since your steps of troubleshooting have failed to reach a singular conclusion, I have a feeling that something got messed up during original pairing of your phone and that particular SIM card.
One test says your phone is fine because other SIMS do their job just fine.
Other test says your SIM is fine because if you put it in another phone and they do their job fine.
Which leads me to one conclusion. There is some kind of pairing glitch with that particular SIM and your phone.
I have only a few suggestions. And you might want to do them ANYWAY.
1: Go to Idea (now Vi) showroom, ask for a replacement SIM. You don't need to explain to them why you need it. Just say it doesn't work or it's scratched. Don't tell them about it working on other phones etc. New SIM costs around 30 - 100 depending if they follow official process or want money in their pockets. Activates within 4 hours with the same plan but OTP will not work for 24 hours.
2: In the meanwhile or if you can't get a replacement SIM use Isopropyl alcohol and clean the current SIM you have.
3: Factory reset your phone WITHOUT your SIM inside and set it up fully without the SIM. (Make sure you remove your Google Account before the Factory Reset.)
4: Last if all else fails. Take your phone to Mi Service Center and make up some stupid reason and ask them to flash your phone. Tell them you have already Factory Reset (3 times 4 times etc) and that it didn't work. By default they automatically will jump to Flashing it, no questions asked.
They will also flash a version of MIUI around 1 or 2 versions behind current version.
All the best and please update after trying these steps.
Click to expand...
Click to collapse
Dayyyyuuummmm...!! I'll definitely try that Man...!! Thanks a lot for those suggestions...!! Will surely update here in detail once the issue is resolved..!

For reference, I faced a similar issue with my Idea SIM after I got it replaced once. I could NOT absolutely make any calls on 3G.
Everyone's SIM in my phone the calls worked fine, my SIM in others phones ALSO worked fine for making calls on 3G. But there was something particularly wrong with this CURRENT SIM and my PHONE together.
I got a new SIM for 30/-
It got activated within 20 minutes.
Everything works fine now.
(No needed to Factory Reset)
It's some pairing miscommunication that occurs at the time of activation and that error somehow stays with the card and phone combined. I'm not an expert on this so I could be wrong.
Technology is weird.

Alrich said:
For reference, I faced a similar issue with my Idea SIM after I got it replaced once. I could NOT absolutely make any calls on 3G.
Everyone's SIM in my phone the calls worked fine, my SIM in others phones ALSO worked fine for making calls on 3G. But there was something particularly wrong with this CURRENT SIM and my PHONE together.
I got a new SIM for 30/-
It got activated within 20 minutes.
Everything works fine now.
(No needed to Factory Reset)
It's some pairing miscommunication that occurs at the time of activation and that error somehow stays with the card and phone combined. I'm not an expert on this so I could be wrong.
Technology is weird.
Click to expand...
Click to collapse
Also one wierd little detail I'd like to share..! As we have Google apps in dialer and messages....and this is for messages app in particular..! Whenever I receivet these flash message or pop-ups of remaining balance or recharge expiry days left after every phone call or sms..... then in my current sim card it comes as a full page banner anything that's currently running will be interrupted unless I cancel that persistent flash message and then continue my work...like full opaque page no transparent or translucent or anything!! And if I put other sim cards then it'll literally show up in the bottom without any interruption!! Just a small place at the bottom of screen...!!! Such wierd stuff happens man! I still can't figure out the reason for that!! Both sim of same company and same recharge plans...still they have completely different behaviour and quality.... technology is genuinely wierd

krutangdesai said:
Also one wierd little detail I'd like to share..! As we have Google apps in dialer and messages....and this is for messages app in particular..! Whenever I receivet these flash message or pop-ups of remaining balance or recharge expiry days left after every phone call or sms..... then in my current sim card it comes as a full page banner anything that's currently running will be interrupted unless I cancel that persistent flash message and then continue my work...like full opaque page no transparent or translucent or anything!! And if I put other sim cards then it'll literally show up in the bottom without any interruption!! Just a small place at the bottom of screen...!!! Such wierd stuff happens man! I still can't figure out the reason for that!! Both sim of same company and same recharge plans...still they have completely different behaviour and quality.... technology is genuinely wierd
Click to expand...
Click to collapse
Same issue with my new Vi SIM. (Didn't happen when it was iDea SIM on the same phone). I have tried every possible thing to block this behavior including contacting my service provider to let them know I don't need the messages cause I'm on Unlimited pack.
This is more to do an issue with the way Vi sends those messages as a priority/emergency and not as a regular USSD message.

Alrich said:
Well since your steps of troubleshooting have failed to reach a singular conclusion, I have a feeling that something got messed up during original pairing of your phone and that particular SIM card.
One test says your phone is fine because other SIMS do their job just fine.
Other test says your SIM is fine because if you put it in another phone and they do their job fine.
Which leads me to one conclusion. There is some kind of pairing glitch with that particular SIM and your phone.
I have only a few suggestions. And you might want to do them ANYWAY.
1: Go to Idea (now Vi) showroom, ask for a replacement SIM. You don't need to explain to them why you need it. Just say it doesn't work or it's scratched. Don't tell them about it working on other phones etc. New SIM costs around 30 - 100 depending if they follow official process or want money in their pockets. Activates within 4 hours with the same plan but OTP will not work for 24 hours.
2: In the meanwhile or if you can't get a replacement SIM use Isopropyl alcohol and clean the current SIM you have.
3: Factory reset your phone WITHOUT your SIM inside and set it up fully without the SIM. (Make sure you remove your Google Account before the Factory Reset.)
4: Last if all else fails. Take your phone to Mi Service Center and make up some stupid reason and ask them to flash your phone. Tell them you have already Factory Reset (3 times 4 times etc) and that it didn't work. By default they automatically will jump to Flashing it, no questions asked.
They will also flash a version of MIUI around 1 or 2 versions behind current version.
All the best and please update after trying these steps.
Click to expand...
Click to collapse
Heyy Man! I got a sim replacement from vi yesterday..I had an idea sim and now it's vi.... and 24 hours later sms services are available so today I tested everything and everything works perfectly fine! I can send sms even when volte is on.... and regarding that annoying full page balance remaining pop up...I just switched my default sms app to signal coz truecaller has already so much of our info and signal seems to respect privacy and also because why not and it's damn awesome you get those alerts in the notification shade now.. which is where they should be... and I hope to not face this issue ever again... Thanks a lot for all the help brother!! Cheers for life

krutangdesai said:
Heyy Man! I got a sim replacement from vi yesterday..I had an idea sim and now it's vi.... and 24 hours later sms services are available so today I tested everything and everything works perfectly fine! I can send sms even when volte is on.... and regarding that annoying full page balance remaining pop up...I just switched my default sms app to signal coz truecaller has already so much of our info and signal seems to respect privacy and also because why not and it's damn awesome you get those alerts in the notification shade now.. which is where they should be... and I hope to not face this issue ever again... Thanks a lot for all the help brother!! Cheers for life
Click to expand...
Click to collapse
I'm glad to be of help. I knew the issue was with that particular SIM pairing. Here's some bonus information for you.
Type *199# in VI
Then send 2
Then send 2
Then send 4
This will stop the Data Notification.
If I have genuinely helped you please give all the comments I've made that helped you a THUMBS UP.
That would really be appreciated on XDA

krutangdesai said:
Heyy Guys,
I'm creating this post after facing terrible issues and embarrassing situations because I can't send sms from my Poco X3. It's a new phone and barely a month old, and I've tried uninstalling updates for career services app, Google messages app rebooting the phone and what not!! Still rarely on some lucky day I can send sms and rest of the time I can't..!! It's really frustrating when you need to do online payment and need to send a verification text..!
Thankfully @Dandito from XDA forum replied to a thread for another poco phone and he said that
"The problem is existing only when the VOLTE service is enabled. Try to move on 3G only or just stop Volte under 4G and it will be ok. Unfortunately Xiaomi are using some specific technology for volte sms sending and the your network provider does not support it. The phone is trying to send SMS through SS7 instead of SIP protocol when VoLTE is enabled. I'm trying to find a hidden menu where I can eventually switch or choose a protocol but without success."
This fix worked for me miraculously therefore kudos to him for finding this..!! Respect+++++++ for this guy!!!
Now if anyone can find a fix for using volte and sending sms at the same time then please please do reply to this thread!! I'm trying my best to find a solution but your help would be great too!!
I did some tests and I have new findings..! Please hear me out!
I can't send sms from my sim in poco x3 when volte is on!!! And when it's off then also rarely it works... sometimes I can't receive any otp on this phone!!
Do note that this idea 4g sim works perfectly and can send and receive sms in my realme 1 with volte on !
Now other sim cards work perfectly in my poco x3!! I tried everyones sim in my house and it worked fine..!!
Now if I complain to idea people then they'll say that it works well on another phone so please complain to phone company..!
And if I go to poco then they'll say that change your simcard as other sim works fine!!!
I'm genuinely tired and frustrated and I get heavy embarrassed while making online payments and imp work stuff!! Sending and receiving SMS is fundamental and necessary and this is barely a month old device!!!
Guys any suggestions would be heavily appreciated
Click to expand...
Click to collapse
To set or change the SMS service center number on your SIM card​
From your Home screen, tap the Application screen icon.
Find and tap Phone.
If the dialpad does not appear, tap the dialpad icon.
Type *#*#4636#*#*.
Tap Phone information.
Scroll down to SMSC.
Tap Refresh to get the current number and the format it uses. If Refresh error or Update error appears, contact your network operator.
Enter the relevant SMSC number in the input field using the correct format with in "", then tap Update. If Update error appears, contact your network operator.