Develop Bugs

[Q] If sim1 is on 3g sim1 is offline

Hi guys, i noticed this big issue using my phone.
If i enable 3g for sim1, sim2 is completely offline (it can't recive or do calls).
If 3g is disabled, both sims work well simultaneously.
As you can undertand in daily use outdoor is a big problem.
Test done in MIUI v37, v45 and v47, Carbon rom, Mooke and CM11.
Have you the same problem? Do you know how to fix it?
Thanks

I have the same problem. It's not your phone or the ROM you are using. It's just that the sims are not full active. The best solutions are:
- Don't use two sims ( I gave up. I have two phones now. Too many missed calls)
- Redirect the calls from a sim to the other(and viceversa)

Hi, I don't know why, but after I wrote this acting on sim settings I found a correct way to receive calls with sim2. Probably just luck in these hours but for now it works! I'll attach a screenshot to show you exactly what I did. Let me know if work also for you, in order to help some other users... [emoji3]

Stock Rom Carrier Unlocked not able to receive/send calls but can use data and SMS

Hey,
So I bought an LG G4 from Vodafone UK and unlocked it so i could use my Three sim card.
Weird thing is I can use Mobile Data and send/receive SMS if I am on 4G. The person who is calling me can hear the calling tone as if they were calling someone but I don't actually receive the call.
When I switch to 2G/3G it simply does not connect to the network.
I have done a factory reset and it did not fix the problem.
Any ideas?
Thanks
tl;dr : can't send/receive calls but can use data and send/receive sms (through 4G only)

radurock said:
Hey,
So I bought an LG G4 from Vodafone UK and unlocked it so i could use my Three sim card.
Weird thing is I can use Mobile Data and send/receive SMS if I am on 4G. The person who is calling me can hear the calling tone as if they were calling someone but I don't actually receive the call.
When I switch to 2G/3G it simply does not connect to the network.
I have done a factory reset and it did not fix the problem.
Any ideas?
Thanks
tl;dr : can't send/receive calls but can use data and send/receive sms (through 4G only)
Click to expand...
Click to collapse
Maybe you need to register your IMEI on the network? That's what I had to for At&t.

How would you go about doing that? Apart from manually searching for networks (I can see other carriers like O2, vodafone, EE, but I can't see my carrier Three ; the person living in the flat with me is on Three as well and they have no problem, so it's not a coverage issue. I have bought the phone from vodafone, unlocked it and trying to use it with Three).
Do I have to call Three for this IMEI registration or..?
Thanks

Hani88 said:
for me the battery is quite good
are you using V20B???
and did you do a factory reset after updating to MM ?
Sent from my LG-H815 using Tapatalk
Click to expand...
Click to collapse
Best bet will be calling your service prover and have them register it. I had to call At&t and have them register my IMEI since I couldn't use internet or make calls.

Just had a long chat over the phone with them and in the end he said the 'engineers' found a 'problem' on their end and it should be fixed in @5 days. He didn't want to mention what problem or how / why it happened. Oh well fingers crossed.
Thanks!

update : so after about 4 calls with customer service (across 3 weeks) and 2 trips to the 'Three' store i'm basically stuck and would need your help guys.
backstory : I've contacted them once at the start of January and they said they found the issue and they will fix it by 7th of January which didn't Happen. On 7th of January they said they are sorry and it will be fixed by 14th of January which didn't happen either. After that I received a message that the problem was fixed and if i had any other issues I should contact them, which I did because the problem was not solved. Yesterday I went to the shop again and the 'tech' guy told me that it should be working and he gave me a new sim card just to be sure, and if that didn't work he said call customer support and ask for contract cancellation. Today I got called by customer service and I have told them that it still doesn't work and I'm paying for something I can't use and I've been told to request contract cancellation which they didn't believe and said I have to pay the rest of the contract length in order to cancel, which is absurd. I went again to the shop and the new customer service person that was assigned to me said they don't have any tech people and she seemed she didn't believe when i said i talked to one the day before. She tested the sim on their phones and it worked and also she took my phone "in the back (strange cause she said they don't have any tech)" and said I had my phone set to 2G (which I didn't, it was set to 2G/3G) and that that was the problem. strangely, for that split moment i had one bar for 3g and the call went through. Straight after that phone stopped working (it was just that small area in which it worked). I told her that that's not the problem and she's like "welp you didn't make your contract at the store, you made it online so I can't help you , you have to call customer service". So I'm basically stuck with a contract which I can't use and I have no idea what to do.
problem : I cannot register to the Three network (only in small random areas, few of them) but I have no problems with other SIM cards from other Carriers (Orange, EE, Vodafone, O2). I have bought the phone from vodafone and unlocked it and last time customer service told me they can't give support to phones that were not bought from their store. So I'm stuck here with a phone contract which I can not use to make or receive calls, but I can use the mobile data and send receive texts. I am considering rooting it and puting a custom ROM , although I'm not sure if that would fix the problems (maybe issues with certain bandwiths?.
Any help or ideas much appreciated!

Same problem here
Hi all. Same problem here but different issue.
Origin : G4 buy used on November. IMEI fully working and not blacklisted (calling my french phone provider this morning, it tell me that's IMEI is ok and phone not stollen and it try to repair remotly my carrier but didn't work)
Problem : Fully working since i picked up a call and answer ... and then when the call is finish i tried to call someone 10 minutes after and totally loose signal(connection) (Orange/Sosh)
What i've maid before : Playing a lot @ a boring but adictive game. High temperature since 3 days because i play a lot but temperature decrease when i stop playing.
I've used a legal app to record a patern and make some actions without my intervention (RepetiTouch Free (root)) to make races in the game.
That's all ! No drop, no hit, nothing ! Just playing, having a call, hang off and then want to make an other call and nothing.
Since the last 6 hours : Signal ok - Data ok (can go on internet / GAPPS etc..) - CAN receive and send SMS (i've don't trie MMS) !!! but .... can't receive and can't send any call.
I was on Genesys 3.5 and i've update to 3.7 when i see the problem, believing that's it will fixe the issue but ... no ....
Formating and going to stock ROM but with root SU etc..... Can't receive and send call too ....
I'm going to back to stock with KDZ .... but i really believe that's it will not work .....
AND .... to finish and kill my joy .... i've unlock bootloader with LG tools since 2 month .....so my phone is no longer under warranty.
My SIM card work on others phones ... other sim cards didn't work in my phone ....
If anyone have this issue ... please tell us

Sorry bro cant help you here. Never heard of that problem before but my idea is that you should refund that phone back to Vodafone UK.

T-Mo Advanced Calling issues . . .

Hey guys,
I got a problem that recently started on my Pixel 2 XL. I am using my unlocked Panda on T-Mobile. I have had no problems at all since I got it. But, here recently I started having problems with the HD calling. I can not make calls to my wife (T-Mo Note 8). Its very curious. I can call anyone else with HD calling on but my wife. When I call her, it will ring once then hang up. The call with go through to her phone and see will see the incoming call for one ring then it is gone. What really throws me off is that she can call me with hd voice and I can have it on and it works no problem. Only when I call her with HD voice do I have a problem. I have tried a lot of things. I will list them below:
1. Reset my network settings
2. Reset her network settings
3. Factory reset my phone (April 2018, 8.1)
4. Try WiFi HD call, works, just not HD calling over LTE
5. Swap sim cards (Swapped her note 8 sim with mine. Her sim calling from my Pixel to her note still not working)
At this point I'm just confused. It worked fine before so what gives now? The only thing I can think is that she did get an update to Oreo 8.0 at the beginning of the month. I think it may have started around then. I can still call my brother with HD calling, on same plan, with LG V20. So what do you all think?
Most I can gather is it may be an issue software wise with my phone or hers. As a temporary fix, I have disabled advanced calling on my phone and all is good. If you all have any ideas or theories let me know! Until then, I will be waiting for a system update to hopefully fix.

S20 Ultra Exynos missing calls intermittently

So I have used my S20 Ultra since March this year.
I've noticed that the cellular network just "sleeps" and doesn't receive calls/SMSes after some time of phone idling/usage on WiFi.
I tried googling and found many other users reporting similar issues, noticing also that it seems majority if not all are Exynos variant users (not based in US).
Personally, this is definitely not a telco provider issue as I have had this issue on my old SIM (which was working fine on my old phone) and new SIM that I recently got after switching providers to see if the issue went away.
For me, sometimes the calls come in a few minutes late, and then the phone rings but when picking up, the call just gets stuck because the other party is no longer calling.
This is particularly noticeable as due to mostly staying home during COVID-19.
Toggling flight mode to "wake" the cellular network makes the phone be able to receive calls again.
Forum thread for reference: https://us.community.samsung.com/t5/Galaxy-S20/S20-Ultra-not-receiving-calls/td-p/1190155

Lucky me. Didn't have this problem on my s20+ exynos
Sent from my SM-G985F using Tapatalk

lynxlok94 said:
So I have used my S20 Ultra since March this year.
I've noticed that the cellular network just "sleeps" and doesn't receive calls/SMSes after some time of phone idling/usage on WiFi.
I tried googling and found many other users reporting similar issues, noticing also that it seems majority if not all are Exynos variant users (not based in US).
Personally, this is definitely not a telco provider issue as I have had this issue on my old SIM (which was working fine on my old phone) and new SIM that I recently got after switching providers to see if the issue went away.
For me, sometimes the calls come in a few minutes late, and then the phone rings but when picking up, the call just gets stuck because the other party is no longer calling.
This is particularly noticeable as due to mostly staying home during COVID-19.
Toggling flight mode to "wake" the cellular network makes the phone be able to receive calls again.
Click to expand...
Click to collapse
I also have this issue (S20+ exynos, dual sim). I use wifi at home/work and I had several missed calls and delayed text messages during this time.
Now I turned on the text alerts about the missed calls. At least when my phone connects again to the network I get these notifications.

I am also having this issue. People call and it rings out at their end but not at my end. Is there any fix?

Try switching the active number to slot 2. I tried it for a couple of days and I think it was better. I have switched back to slot 1 to monitor as I just got the ATE6 update and wanna see if it changed anything.

I had this issue and figured out what was causing it. You need to disable VoLTE if you are not registered to use this service on your carrier's network.

ctp9 said:
I had this issue and figured out what was causing it. You need to disable VoLTE if you are not registered to use this service on your carrier's network.
Click to expand...
Click to collapse
My sim cards are already registered to use VoLTE, my carrier notified me a few months ago about it.
I tried to disable VoLTE on both sim cards. It was OK for 2 weeks until now.
I got a new missed call notification text message and after 5 minutes a message from the caller.
Now I enabled VoLTE again for one sim card. Let's see if there will be more missed calls with this setting.

I am unable to use my Jio Sim in Lineage OS 16.

I am Unable to make calls on my samsung galaxy on nxt after I have installed Lineage OS 16 in my phone it shows only call ended when I make call and also if some one calls me they hear that my device is switched off. However, I am able to use internet through that sim but unable to receive messages. Please help me out fast.

I was facing the similar issue, I was able to use the internet properly but i was facing network issue with the calls.I went to service centre and i was adviced to go and change the sim.Why dont you try that and let me know.

I already have an airtel sim that works fine but my all bank accounts and most of the things are registered on Jio no. Please give a solution.