2 sims in Oppo Reno 2Z - OPPO Reno Questions & Answers

Hi all, since last month I'm not able anymore to have 2 sims in my oppo reno 2z. I have fastweb my private with internet data and vodafone only voice as bussiness. It has been always like that, but unfortunally it doesn't work anymore. It means, if 2 sims are in I can just make calling and receiving, but any internet, social and whatever asks "data" connection. As example, if I write a msg in wathsApp it stays there waiting for connection. I've tried several restart, switch off, switching sim positions, nothing change. When I remove 1 sim, then every thing works fine. Some idea how to try? Thans

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No 3G

Hi all,
Could someone please advise me?
I bought my TyTN II in early December 2007 and everything was fine until about a week ago. Since then I can't get a 3G connection -- either phone or data. I tried my Sim card in my old SPV M700 and was able to get 3G but no HSDPA.
Is this a problem with my Kaiser and would HTC do be able to do something about it?
Has this happened to anyone else?
perhaps you disabled 3g,
in the phone settings you can choose if you want only gsm or also with 3g...
Does your network support HSDPA?
I have the same problem.
When I'm staying in non-3G zone, than I can use only phone and EDGE and my operator is EMT.
When I'm staying in 3G zone, than my operator changing to "3G EMT" and I can't use neither phone nor 3G.
Sorry I didn't explain things clearly.
I am with Orange UK and everything was fine until 1 week ago -- 3G, HSDPA etc all worked fine. I have not made any changes to the settings, although I have had to now because if I opt for 'Auto' in the band tab in phone options, I get GSM but then am unable to get any data connection at all -- I get an error message saying "cannot connect due to unknown reason". If I select GSM as band then I am able to get GPRS but no 3G/HSDPA.
I have tried the phone in various places -- even in a different city yesterday, but no joy.
I suppose I will have to ring HTC tomorrow and see what they say
I dont know if you read your PM. Look at your Control panel and read the messege I sent you.
Send it to me too pls. )

Dual Sim Data Questions

Hi,
Got the note 9 since friday. working great. but i noticed that when i call on sim2, i can use mobile data of sim 1.
Default mobile data is from sim1. and phone calls are set to ask every time.
now my sim2 is my work number. during the working hours i call alot with this number.
my sim 1 is my private sub from t-mobile. and i mainly use the data plan of it. since i dont wanna use the internet that my boss pay's for for my personal use.
Now since i got this setup. what happends is. some one texts me a foto through whatsapp. and then calls me to sim2 before i can look / dowload the picture. then when i pickup the phone they ask me did u see the picture i sent you. i then open whatsapp. but i get the msg no network.
what i noticed is that when i call on sim1 i still have LTE data. (cause sim1 provides the data)
so it cant use data from sim 1 and voice from sim2 at the same time?
also is there a way to set certain apps to use data of a specific sim card?
lets say i open my 2nd whatsapp that it loads the images sent there from my sim2 network
but when i open my 1st whatsapp (2nd app cloning) it uses data from sim1?
or any other apps for exmp chrome and samsung internet?
is there any tweak that automates the switch data to sim2 as soon as i make a call with sim2?
now i can just click on the sim settings menu and change the default data to sim2 to receive data during the call. but when im driving in my car this are alot of buttons to press and i rather not.
i don't own N9 yet. read about dual sim technology varieties on the net, theoretically N9 should be able to get dual VOLTE feature on both SIMs (assuming it supported by carrier(s), and phone shows VOLTE icon on both SIMs). in the event you are making call on SIM 1 & trying to get data on SIM 2 or vice versa, this requires dual sims dual volte (DSDV) feature kicks in and liberates you to choose which SIM to get data from.
might really want to consult with your carrier(s) if both SIM support VOLTE.
Are you able to get VoLTE and WiFi calling to work on the international dual sim F variant of Note-9 on US T-mobile network?

Dual Sim issues, can't make calls on sim1 when sim2 is inserted

Hi,
I rebranded my VTR-L09 to L29 two years ago.
Since then I use the dual SIM functionality nearly every day at work.
SIM1 is my private card, SIM2 is my work card.
Both are in the same network (Vodafone DE) but different providers (SIM1 is 1und1 and SIM2 is Vodafone).
Since some days I'm not able to make calls with SIM1 when SIM2 is inserted.
When I try to make a call while SIM2 is active, the phone app switches automatically to SIM2 without asking.
When I disable SIM2 in Dual SIM settings, I get the message "Mobile network not available" (translated) when I try to make a call.
When SIM2 is removed I can make calls without any issues.
Internet (HSDPA+ and lower, LTE is not available in my contract) and receiving calls is still possible and without any issues even SIM2 is active.
In dual SIM settings the standard SIM for calls setting is disabled, but even if I set it to SIM1 the calls will go over SIM2.
I already called my provider and I will get a new sim card but I doubt that this is the issue.
Does anyone knows this and is there a fix for this?
I'm on C432 B376 by the way, and there's no update available for me, yet.
My phone is also rooted.
A factory reset would be very annoying since it takes extremely long time to back everything up.
Greetings,
Jannomag
I also have rebranded my VTR-L09 into VTR-L29, but I have no dual SIM issues. Build number 376 (C432). What happens if you swap the SIMs?
The same issue, but inverted. The phone switches to my companies sim card automatically.
Is it possible that the network provider block this standby dual sim thingy?
I received my new sim card but it still doesn't work.
A few days ago I installed Google's phone apk as a second phone app for my second sim, because I wanted to seperate my private and companies contact lists. This didn't worked as I expected and I completely removed it and deleted cache and dalvik via TWRP.
Maybe the issue was produced by this, but how do I remove it?
It sounds like a plausible explanation. If that is the case, I am afraid the only thing that will help is a factory reset, unless you figure out what changes were made by the google phone app.
I did a factory reset...took about 5 hours to get everything like it was before.
Even with TB some apps don't work good (WhatsApp for example, needed to reinstall it...but somehow the backup from yesterday was gone, so I got a throwback to last week).
Now I can make calls again as usual. Strange behavior...
It looks that google dialer apk messed something in your phone. good to hear,that all is ok now.
I am also rebranded VTR-L09 to VTR-L29 year ago. I am on C432 B379.
both SIMs are on Vodafone network and everything works as it should (SIM1 - private+data enabled, SIM2 - work+data disabled).
I am on stock firmware, no root, stock dialer. @Jannomag : 5 hours?Really? I made factory reset two months ago (backup trough huawei backup) and it was matte rof 1 hour. Of course i have to sign in to FB,Whatsap,instagram...

Xiaomi mi 9T Pro - Problems receiving calls while on 4G

Hello!
I hope someone can help me with this "little" problem that I'm experimenting with my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) I checked everything before buying and the phone is fully compatible with my carrier (I'm from Venezuela), however, I noticed that when the phone is on 4G it switches to 3G/H/H+ in order to make/receive calls (which is pretty normal since my carrier does not support VoLTE). The problem comes when there is an incoming call, it should switch automatically to 3G/H/H+ BUT it does not happen all the time, in fact, I can say that it only happens 25% of the time when I was testing, of course, when it does not happen there is no way to receive the incoming call.
So far I tried:
- Forcing the phone to stay on 3G (everything works great)
- Testing the different network options (it switches from 4G to 3G but not always as it should)
- Switching from SIM slot 1 to slot 2
- At the moment the preferred network type is LTE/TD-SCDMA/UMTS (default)
Could it be a software issue? or could it be related to my carrier? I haven't tried using a SIM card from another carrier.
After all, I bought a PHONE that does not behave like an actual phone all the time, so, I hope someone can help me with this.
Thanks in advance.
Thank you, I almost thought I was the only one.
I bought my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) a week ago and I have the same symptoms like you.
Im on A1 Network in Austria running default network settings and I realized after hours I couldn't make calls (and obviously did't receive any).
This is the first phone I had this network problems, and I am on A1 network for 20 years with different phones....
I hope someone can share some light why this happens and what are the best settings for European (Austrian) A1 network.
Trying to switch to LTE/UMTS, but that setting is always reset to the default above after reboot.
As its also my work phone it would be very bad not recognizing for hours that I'm not reachable...
Thank you !
A1 supports VoLTE, try to enable it on your phone, I have no issues running a dual SIM config with A1 and 3 .....
pietropizzi said:
Thank you, I almost thought I was the only one.
I bought my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) a week ago and I have the same symptoms like you.
Im on A1 Network in Austria running default network settings and I realized after hours I couldn't make calls (and obviously did't receive any).
This is the first phone I had this network problems, and I am on A1 network for 20 years with different phones....
I hope someone can share some light why this happens and what are the best settings for European (Austrian) A1 network.
Trying to switch to LTE/UMTS, but that setting is always reset to the default above after reboot.
As its also my work phone it would be very bad not recognizing for hours that I'm not reachable...
Thank you !
Click to expand...
Click to collapse
Hi! It feels better knowing that I'm not alone.
The fact is that I can actually make calls (it take from 3 to 5 seconds switching from 4G to 3G/H), the problem comes when there is an incoming call, sometimes it works (it switches to 3G/H and when the call is ended, it switches back to 4G) but most it does not. I just tried LTE/UMTS and it does work but not for long, I can see that it happens and sometimes it does not. I found a "solution" which involves forcing to 3G/H but it's not the point, there should be a real solution. At this moment, I haven't found a correct network configuration, all the ones that I've tried just have worked for me for some time, and then the problem is back without even rebooting the phone. Could it be caused by a faulty SIM or it's just a network/carrier issue? I don't want to think that it's a hardware issue.
error23 said:
A1 supports VoLTE, try to enable it on your phone, I have no issues running a dual SIM config with A1 and 3 .....
Click to expand...
Click to collapse
Whats your ROM Version ?
I alreaddy tried to enable VoLTE, I can switch it on and the VoLTE Symbol appears.
The problem is - I have no caller ID. I don't even see the phone number when someone calls me ("unbekannter Anrufer" - "unknown caller")
That's not conveniant, so as soon as I switched OFF VoLTE caller recognition was enabled again.
Is VoWIFI working at you with A1 ? I can enable it but I don't get the symbot at home in my WIFI network.
So for now I see two options:
- the correct (stable) network configuration for Austria that persist in the phone configuration
- enabling VoLTE but with a solution for a working caller ID
I finally got found the solution
Problem is the notification settings.
This was somehow reset after the update to mui 11.
To fix the issue:
1. Go to settings
2. Click notification
3. Click the notification badges (3rd icon)
4. Find the "phone" icon
5. Enable the show notification
6. Exit to settings and test
Having same problem
Can someone help me I am from Malta and have Xiaomi mi9t pro and from last night stopped receiving calls and incoming . Tried with sim 1 and it worked but it happened again . I tried the notification settings but still the same problem .
I had trouble not receiving calls also...
After looking here, and also on YouTube, I started going through my phone again. I too was not getting my calls a lot, but I have only had my phone maybe 2 weeks, so there's not much on it yet. One thing I am always adding is themes. The theme feature is it's own pre installed app as I'm sure we've all seen. Different one's have been doing/blocking certain features at times on my phone. My husband's calls were being sent to voicemail, and some other important calls. I noticed the other day when I tried a new theme it locked me out of my phone with no preface to get back to the lock screen. I had to take a picture and select send to get back to the lock screen. Remembering this, I decided to go back to the original developer theme for the phone. My phone now rings. Original developer mode also controls the call feature, not just the theme, which I did not know or read until now. Going back to it I believe kind of reset my configuration. I would say give this a try for sure. Hope it helps someone else I love my phone and didn't want to lose it. FYI, I am on TMobile network in the USA.
Hi!
I have a very similar problem on a xiaomi redmi note 8t. I tried various settings, but failed. This is annoying because the phone is relatively new. I think it is a hardware problem.
Saulor said:
Hello!
I hope someone can help me with this "little" problem that I'm experimenting with my Xiaomi mi 9T Pro running MIUI Global 10.3.3.0 (Stock) I checked everything before buying and the phone is fully compatible with my carrier (I'm from Venezuela), however, I noticed that when the phone is on 4G it switches to 3G/H/H+ in order to make/receive calls (which is pretty normal since my carrier does not support VoLTE). The problem comes when there is an incoming call, it should switch automatically to 3G/H/H+ BUT it does not happen all the time, in fact, I can say that it only happens 25% of the time when I was testing, of course, when it does not happen there is no way to receive the incoming call.
So far I tried:
- Forcing the phone to stay on 3G (everything works great)
- Testing the different network options (it switches from 4G to 3G but not always as it should)
- Switching from SIM slot 1 to slot 2
- At the moment the preferred network type is LTE/TD-SCDMA/UMTS (default)
Could it be a software issue? or could it be related to my carrier? I haven't tried using a SIM card from another carrier.
After all, I bought a PHONE that does not behave like an actual phone all the time, so, I hope someone can help me with this.
Thanks in advance.
Click to expand...
Click to collapse
I have the same issue here in same phone but on EU MIUI 12.0.3.0 .. with the same symptoms u described .. i suspected in sim card and i replaced it with a new one and the issue still there .. did u find a solution for this issue?
I'm not sure if this is the same issue as what's described by OP, but it's somewhat similar (not receiving calls). Sometimes my colleagues will call me on Whatsapp and state that they're unable to reach me via the cellular network. This is what fixed it for me:
Settings - SIM cards & mobile networks - Select your sim card - turn off 'use volte (use volte to improve the quality of voice calls)'
scarmage said:
I'm not sure if this is the same issue as what's described by OP, but it's somewhat similar (not receiving calls). Sometimes my colleagues will call me on Whatsapp and state that they're unable to reach me via the cellular network. This is what fixed it for me:
Settings - SIM cards & mobile networks - Select your sim card - turn off 'use volte (use volte to improve the quality of voice calls)'
Click to expand...
Click to collapse
I tried this option and also not working the issue still there since 10 daysi also tried
Settings all specs then internal storage then sim 1 then change the setting to gsm only
After that the line working for 10 min and then again i can't receive calls or make ones
I have the same problem i have a redmi note 9 pro, i can't receive calls in 4G, i only can receive calls in Edge someone could resolve this? I tried all of these methods but nothing works

Question Big issue, No Data during a call.

So One thing I discovered on this new phone of mine is that although working perfectly there is a major flaw in the way Internet data works during a phone call.
Any time you make a call, the phone downgrades the active signal from 5G/4G to H or E ( GSM).
Which in turns cuts off the data.
If I force 5G or 4G, then the phone call cannot be made. It just disconnects.
I have tried all settings, Volte enable/disable with no joy.
Some have said it's a carrier limitation, but it's not, cause in my iPhone, the very same simcard works just fine and the Internet is usable during a call.
Also tried with dual Simcard setup. As in the settings, the phone allows to use one simcard for data and one for call. Still not working.
Can someone please tell me if there is a solution please, or can you try your phone while on the call to see if Internet works as this feature is detrimental to me keeping the phone. If this doesn't work I will be selling the phone and getting a realme replacement.. Xiaomis sometimes suck with their non existent support.
Thanks
Evo400 said:
So One thing I discovered on this new phone of mine is that although working perfectly there is a major flaw in the way Internet data works during a phone call.
Any time you make a call, the phone downgrades the active signal from 5G/4G to H or E ( GSM).
Which in turns cuts off the data.
If I force 5G or 4G, then the phone call cannot be made. It just disconnects.
I have tried all settings, Volte enable/disable with no joy.
Some have said it's a carrier limitation, but it's not, cause in my iPhone, the very same simcard works just fine and the Internet is usable during a call.
Also tried with dual Simcard setup. As in the settings, the phone allows to use one simcard for data and one for call. Still not working.
Can someone please tell me if there is a solution please, or can you try your phone while on the call to see if Internet works as this feature is detrimental to me keeping the phone. If this doesn't work I will be selling the phone and getting a realme replacement.. Xiaomis sometimes suck with their non existent support.
Thanks
Click to expand...
Click to collapse
This comes from the operator who has not yet communicated with Xiaomi.
Same case with 2 operators on the same phone.
What version of rom?
NOSS8 said:
This comes from the operator who has not yet communicated with Xiaomi.
Same case with 2 operators on the same phone.
What version of rom?
Click to expand...
Click to collapse
Global ROM 13.0.4
I can't see an operator fault if they have Volte services enabled and this simcard works flawlessly on other android systems.
As a matter of fact, any SimCard i have tried, so far 3 providers and the phone does the same thing. As soonest the call is made it downgrades the signal to H while full 5G or 4G is available??
Evo400 said:
Global ROM 13.0.4
I can't see an operator fault if they have Volte services enabled and this simcard works flawlessly on other android systems.
As a matter of fact, any SimCard i have tried, so far 3 providers and the phone does the same thing. As soonest the call is made it downgrades the signal to H while full 5G or 4G is available??
Click to expand...
Click to collapse
the operator must provide the necessary information for each brand and phone to activate Volte and Wowifi.
On my 11t pro everything works with SFR and nothing with FREE because Free has not yet transmitted the information necessary to activate the services.
So went to see the operator. They sell Xiaomi phones. 3 network ( Three EU)
The phones in the stores are working just fine, no issues at all. And my phone simply just isnt.I have tried every possible setting and still not working.
See the screenshot below. As I'm typing this I'm on a super fast full signal 5G connection. As soon as I make a phone call, the phone will downgrade to E or H+ which is horrible. This network signal switching is also laggy, and If 2g signal is poor I cannot even make a call.
Evo400 said:
So went to see the operator. They sell Xiaomi phones. 3 network ( Three EU)
The phones in the stores are working just fine, no issues at all. And my phone simply just isnt.I have tried every possible setting and still not working.
See the screenshot below. As I'm typing this I'm on a super fast full signal 5G connection. As soon as I make a phone call, the phone will downgrade to E or H+ which is horrible. This network signal switching is also laggy, and If 2g signal is poor I cannot even make a call.
Click to expand...
Click to collapse
Does the "Use VoLTE" switch appear in the SIM card settings?
If not you can try the Dialer Code *#*#869434#*#*. That only will make this switch appear, but sometimes this is enough. It should also show the little VoLTE-Badge next to the signal strength (see screenshot).
Deleted
I just had another look and on your 1st post it says the SIM is named "3 IRL", as far as I know Three Ireland does not offer VoLTE at all.
So it will always drop to 3G/H+ or 2G/E ... on every phone.
mici01 said:
I just had another look and on your 1st post it says the SIM is named "3 IRL", as far as I know Three Ireland does not offer VoLTE at all.
So it will always drop to 3G/H+ or 2G/E ... on every phone.
Click to expand...
Click to collapse
5G connection should support this naturally. If I put this simcard Into an iPhone or Galaxy the 5G connection stays on regardless.
Anyway even with Vodafone this doesn't work,so I'm thinking it either a phone limitation or a phone is fooked
Evo400 said:
5G connection should support this naturally. If I put this simcard Into an iPhone or Galaxy the 5G connection stays on regardless.
Anyway even with Vodafone this doesn't work,so I'm thinking it either a phone limitation or a phone is fooked
Click to expand...
Click to collapse
No, for VoNR your phone still needs the same configs as with VoLTE. Though only a few operators support VoNR as of now.

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