Why is Internet not working when on call ? - Redmi K20 / Xiaomi Mi 9T Questions & Answers

I have 2 major issues with K20:
1. I have two 4G sims. When I am on a call with sim 1, the internet stops working (even with sim2). I have already set it to use sim 2. Also, all 4G and Volte options are ON. How to solve this?
2. I am seeing useless "On this day" calendar notifications that today is this and that holiday (Example - 6Oct is Durga Ashtami in India). There is no option to disable such notifications. What to do?
The MIUI community is so useless that nobody there actually solves anything, they are just stuck in a cycle of fake self-praise and hollow marketing.

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Huge delay in SMS all of a sudden - help

Guys,
All of a sudden (last few days) I've been receiving a huge delay in SMS delivery to myself (anything up to 24 hours). I've tried the SIM in another handset (different model) and had no issues. There seems to be nothing wrong with Vodafone UK's service currently so it's a setting on my handset.
The only thing I have fiddled with is the data connections in terms of automatically firing up to drag down my emails over GPRS/3G/HSDPA whatever is available.
I think that the 3G network is causing the issue but I'm not sure how to test.
Please help
Thanks
I had similar issue after roaming in another country. The problem just disappeared in few days. As usual I'm not sure about this - you can avoid 3g by Start>Settings>Phone>Band>Select your network type. Change it from AUTO to GSM. This worked for me when my provider was doing maintenance of its 3G service.
Yup happpens to me all the time, i make a call and recieve loads a texts!!
just an update - i hard reset as my sim worked in another phone and this seemed to sort the issue....rather worried it might come back though!

Accept button does not work on incoming calls

I am part of a corporate group that just started using the Palm Treo Pro, through Bell. We have in excess of 30 phones across the company, and 90% of the users are unable to accept incoming calls. The calls show on the screen, the phone rings, but neither the accept soft button on the bottom of the screen or the send button on the phone will allow us to pick up the call. The call then goes to voicemail, then we get notifications that we missed a call.
The strange thing is that about 4 out of 6 calls have this happen. Then out of the blue, it will work, then the next call it will not accept it. I have done a hard reset on the phone, no third party apps running either.
Anybody else seeing this? I have yet to find any major problems with this phone through research, so are we the only ones to see this problem?
I have a Bell Treo Pro phone as well, I have never had any of these issues, I am sorry to hear.
Re: Unable to answer calls
I have had this happen multiple times. Each time I traced it down to whichever profile manager I had installed, whether it was Gprofile, PhoneAlarm, SPB Phone Suite and several others. Once I uninstalled the software no more problems answering calls. I wish that PhoneAlarm wouldn't cause this problem as the ability to automatically switch profiles based on time or appointment status was awesome - no more ringing phone when in a meeting because I forgot to mute the phone.
So the only time this issue has presented itself is with a profile manager? Nobody in our company has installed a profile manager of any kind, there may be some various third party apps, but these don't seem to make any difference. We are now thinking that we have a batch of defective phones.
Thanks for the responses!
Rich9584 said:
I am part of a corporate group that just started using the Palm Treo Pro, through Bell. We have in excess of 30 phones across the company, and 90% of the users are unable to accept incoming calls. The calls show on the screen, the phone rings, but neither the accept soft button on the bottom of the screen or the send button on the phone will allow us to pick up the call. The call then goes to voicemail, then we get notifications that we missed a call.
The strange thing is that about 4 out of 6 calls have this happen. Then out of the blue, it will work, then the next call it will not accept it. I have done a hard reset on the phone, no third party apps running either.
Anybody else seeing this? I have yet to find any major problems with this phone through research, so are we the only ones to see this problem?
Click to expand...
Click to collapse
same prob here, very fustrating!!!
bell treo also
Possibility
AFAIK, Bell Canada runs on a CDMA network? I haven't seen the band settings for a CDMA version of the Treo Pro, but I was having a similar problem with my unlocked GSM Treo Pro on the US T-Mobile network. I would dial a number, and as soon as it connected it would hang up. This happened multiple times. After some searching around, I came across a post that theorized that since the phone band settings were set to auto, and the phone was capable of detecting the 2100MhZ 3G band (used by AT&T), it was "confused" and tried to connect to that 3G band. It suggeted going into the settings, go under phone, then go to the band tab & change the network type from "Auto" to "GSM". I changed this setting, did a soft-reboot, and things have been fine ever since. While this method is obviously for the unlocked version of the phone, maybe if you set it to the specific network band for your wireless provider it might help?
ThrillHill1 said:
AFAIK, Bell Canada runs on a CDMA network? I haven't seen the band settings for a CDMA version of the Treo Pro, but I was having a similar problem with my unlocked GSM Treo Pro on the US T-Mobile network. I would dial a number, and as soon as it connected it would hang up. This happened multiple times. After some searching around, I came across a post that theorized that since the phone band settings were set to auto, and the phone was capable of detecting the 2100MhZ 3G band (used by AT&T), it was "confused" and tried to connect to that 3G band. It suggeted going into the settings, go under phone, then go to the band tab & change the network type from "Auto" to "GSM". I changed this setting, did a soft-reboot, and things have been fine ever since. While this method is obviously for the unlocked version of the phone, maybe if you set it to the specific network band for your wireless provider it might help?
Click to expand...
Click to collapse
Evidently the Palm Treo's that we are using do not have a Band tab in phone settings. Supposedly we have some replacement phones on the way from Palm, so now it will be a matter of seeing if they work or not. There's only about 25% of us that are having these problems, so there may be some hope for us yet.
Thanks for the response, though!!
I had similar probs due to a bad app install. hard reset fixed everything for me. there is also a palm support ringer update that just came out not too long ago. you can also change your cellular radio settings to check for calls more frequent.

[Q] Problems with Receiving SMS

Dear Samsung Focus users,
I really need your help and suggestions. I bought an unlocked samsung focus last week and I love it! But I have this problem:
- I cannot receive text messages until I reboot the phone
- After I reboot the phone, text messages will start flying in to my inbox
- Then the problem starts again and I have to reboot the phone to retrieve new text messages
I live in the basement but I have no trouble calling or sending and receiving SMS with my previous phone.
I hope it has something to do with the OS thus they can fix it.
Thanks!
Sometimes I get it where the device thinks it's on the network, but won't use cellular data or SMS. I'll see this after being in the basement for a few hours with a signal that fades in and out.
Try turning on Airplane mode, wait 5 seconds, and turn airplane mode off. It should reconnect to the network and start running again.
I've seen this on 'droids, WinMob 6, and on the iphone 3 as well. I've just sort of figured it was the radio chip giving up on retries. I could be wrong, but recycling the radio seems to work for me.
koornneef said:
Sometimes I get it where the device thinks it's on the network, but won't use cellular data or SMS. I'll see this after being in the basement for a few hours with a signal that fades in and out.
Try turning on Airplane mode, wait 5 seconds, and turn airplane mode off. It should reconnect to the network and start running again.
I've seen this on 'droids, WinMob 6, and on the iphone 3 as well. I've just sort of figured it was the radio chip giving up on retries. I could be wrong, but recycling the radio seems to work for me.
Click to expand...
Click to collapse
when you have no signal, the operator will keep trying several times during different time spaces until your phone gets it. the problem with focus is that they quit trying to received. i dont know but only works after a reboot. In other phones you just need to wait till next carrier push try. i think its a bug, probably to unlocked phones. I have an At&T unlocked focus.
I am having the exact same problem. I dont know what to do
Count me in.
I am also experiencing this issue.
Here are my thoughts on the issue.
1. I bought the phone from Rogers (GSM)
2. I bought an Unlock code from the web (SIM Unlock only)
- You know you're device is carrier locked if you cannot run Samsung's Network Profile App, or if it shows no other profiles in the list. The app is available on the marketplace.
3. I use the phone on SaskTel's 4G network (Saskatchewan UMTS/HSPA+)
Now my thought is this.
Whichever settings are not provided by SIM are set by the Network Profle xml that is specific to each carrier.
My assertion is that if you cannot change Network Profiles via Samsung's app, you cannot use your 'carrier free' (AKA SIM unlocked) device on another network without some hiccups.
If someone can figure out how to enable Samsung's Network Profile on a carrier purchased device, I'd be happy to hear how it's done.
I should also note that I've since developer unlocked via Chevron's WP7 tools with no change (Installed NoDo right after).
If someone knows what the network profile xml actually sets and can figure out an alternate way to set the settings..... ie Registry editor, etc. We would appreciate this.
dead_on_the_floor said:
I am also experiencing this issue.
Here are my thoughts on the issue.
1. I bought the phone from Rogers (GSM)
2. I bought an Unlock code from the web (SIM Unlock only)
- You know you're device is carrier locked if you cannot run Samsung's Network Profile App, or if it shows no other profiles in the list. The app is available on the marketplace.
3. I use the phone on SaskTel's 4G network (Saskatchewan UMTS/HSPA+)
Now my thought is this.
Whichever settings are not provided by SIM are set by the Network Profle xml that is specific to each carrier.
My assertion is that if you cannot change Network Profiles via Samsung's app, you cannot use your 'carrier free' (AKA SIM unlocked) device on another network without some hiccups.
If someone can figure out how to enable Samsung's Network Profile on a carrier purchased device, I'd be happy to hear how it's done.
I should also note that I've since developer unlocked via Chevron's WP7 tools with no change (Installed NoDo right after).
If someone knows what the network profile xml actually sets and can figure out an alternate way to set the settings..... ie Registry editor, etc. We would appreciate this.
Click to expand...
Click to collapse
you may try the fix posted on page 2 of this forum for sms not receiving. It worked for me and not having any problems since.

Sim card disappears after 2-4 minutes when making calls with VoLTE enabled

My v20 drops all calls between 2 and 4 minutes in, and usually around the 3 minute mark. The call drops, signal goes to zero, and a moment later I get a toast message saying "Loading SIM card contacts..." and then I can immediately dial back in.
WiFi calling is disabled, though the setting being on or off doesn't seem to make a difference. I've cleaned the SIM card and added tape to the back to ensure good connectivity - no change. I also went to T-Mobile and they replaced my SIM on the spot but it immediately happened again in the store and in front of the clerk when we tried a call. They've suggested a warranty exchange.
One interesting thing I've found though is that disabling VoLTE calling fixes it entirely - it no longer drops calls, but of course there's no HD voice and I can't use band 12 and they're already cutting back on HSPA coverage.
Haven't found anything else useful via Google or XDA. Even with VoLTE enabled there are no data drops, VOIP calling via hangouts works fine. Anyone have any ideas short of a full exchange? Not rooted and while the LG backup app is pretty good, I really don't want to go through the day-long process of restoring everything if I can avoid it.
Hey there! I had the same issue, exchanged the phone for a new one, and STILL have the same isssue! Did you ever find another fix? This is so annoying and I cant believe a bigger deal isn't being made of it.
Something wrong with ur
operator
Sent from my LG-H990 using Tapatalk
Been owning V20 for about 5 weeks now. The first 3 weeks were pleasant until I started seeing dropped calls. Disabling VoLTE did not help. Changing sim card wouldn't help either.
I'm having similar issues H915 Freedom Mobile.
Was roaming on AT&T in the US when I first did the update. And everything was fine till I was home and on Freedom.
When Wi-Fi calling is enabled. It makes no difference if mobile preferred or VoWIFI preferred is selected. It enables either way after reboot or turning Wi-Fi adapter off and on again.
Incomming calls frequently don't come through regardless of whether vo wifi is on or off. Texts same problem. And persists sometimes on cellular and sometimes on VoWifi.
Get SIM errors, signal drop constantly. And have tried everything I can think of to rectify the issues with zero success.
Anyone with Freedom having similar issues? Or any suggestions I might not have thought of that may be the the cause?
- Chris

Wifi calling not working.

I received a new pixel 4a 5g on Friday. I have spectrum mobile and I can't get wifi calling to work. I have called spectrum twice and have gone to the local spectrum store. I have also chatted with a Google tech. No one can get it to work.
No issues with WiFi calling. Have you tried switching to airplane mode and re-eanable Wifi only? This switches on Wifi calling quickly on my 3a and 4a5g
v said:
No issues with WiFi calling. Have you tried switching to airplane mode and re-eanable Wifi only? This switches on Wifi calling quickly on my 3a and 4a5g
Click to expand...
Click to collapse
Yes, I tried that. It didn't work.
It just started working this morning.
There seem to be problems with WiFi Calling on T-Mobile:
T-Mobile WiFi Calling one way audio
After the connection switches between mobile and Wifi Calling, there is only one way audio, the other party can hear me but I cannot hear the other party. The only fix seems to be to reboot the phone, but after a while the problem is back. It...
forum.xda-developers.com
sirxdroid said:
There seem to be problems with WiFi Calling on T-Mobile:
T-Mobile WiFi Calling one way audio
After the connection switches between mobile and Wifi Calling, there is only one way audio, the other party can hear me but I cannot hear the other party. The only fix seems to be to reboot the phone, but after a while the problem is back. It...
forum.xda-developers.com
Click to expand...
Click to collapse
Yes, I had this exact issue. Fix was to reset Wi-Fi, mobile & Bluetooth. Hope it doesn't return, but we'll see.
Hello all,
I also have a 4a 5g phone that I've been trying like hell to get working. Started with just seeing if I could find it myself. Found something in the settings (gone now), but it said something about WiFi calling. It happened to be grayed out.
Next step was calling tech support. They could help me and they convinced me that I have to change the sim card. OK change the sim card for using wifi calling. Whatever, the sim card arrived today and I swapped it out. Now I don't have phone service and I still can't get wifi calling.
My question is where is the setting for turning wifi calling off and on? I follow these directions;
How to Enable WiFi Calling on Android 11 Stock OS
Step 1: Pull down the notification panel at the top and touch the “Settings gear (Cog)” icon.
Step 2: Touch on “Network and internet”.
Step 3: Touch “Mobile network”.
Step 4: Scroll down and touch on “Advanced”.
Step 5: Tap on “Wi-Fi calling” in the calling section.
I follow the steps and it states my wifi calling is on. Yet when I call, it's is calling tech support. I've spent way too much time with dodgy tech support. Not sure what I can try at this point. Fortunately I have other telephone options, but not my main.
Any help would be greatly appreciated.
Us3r_1,
I followed your steps 1-5 on my 4a5G and on T-Mobile and Vodafone it works for me.​
What do you mean by
> Yet when I call, it's is calling tech support.
?​
v said:
Us3r_1,​I followed your steps 1-5 on my 4a5G and on T-Mobile and Vodafone it works for me.​​What do you mean by​> Yet when I call, it's is calling tech support.​?​
Click to expand...
Click to collapse
Sorry for the confusion here. and thanks for the reply. OK it shows that my wifi calling is on, I don't have any phone service at the moment. Regardless of what number I call, it goes to the step through for getting to different options, like activate phone, change number, and so on. It seems like I have to turn off the phone connection to get wifi calling to step in. BTW, this SafeNet which I think they use Tracpone.
EDIT: My service is not SafeNet, nor SafeLink, but is Net10 on Tracpone. Not for long though.
You're welcome.
BTW: On my 3a I had to restart the phone from time to time. Perhaps this helps in your case.
Double check with your provider that WiFi is switched on for your account.
Yeah I reboot several times through all this. Just did now too. I did see an option to preference wifi calling over phone service. I did that and still it goes to stepping through to options in the phone service when I try to make a call.
You could try switching to airplane mode and then enable wifi only. Keep airplane mode, don't switch it off. Try calling then. This forces Wifi calling.
Finally got the option and my phone working. You are not going to believe what the problem was. It ended up that the service, BTW the service is Net10 Wireless, anyways they had the old sim card number on my account and they were using the the old number! The directions on the new sim card sent, stated to put the new card in the phone and call the number provided, which I did. I gave them the new sim card number and I assumed everyone was working with the new sim card. After well over 6 hrs with "tech support", some with a roster clearly calling out in the background. At the end I was demanding upper management right when I contacted someone. Finally had this tech support go through all the records and she figured out the sim card number was screwed up with the parties.
I'm pissed, it shouldn't take over 6 hrs and 2 days to get this resolved. I pointed out that this was the stupidity of "tech support" that caused practically this whole delay and I would say this people started the whole thing! I called up to get wifi calling up and running. The "tech support" stated that I need a new sim card. Which was the start of this mess. More than 23 calls to them regarding this!
In the end, I put the old sim card in and everything works! Even wifi calling works!
Great!
Looks as if I was close when I wrote:
>Double check with your provider that WiFi is
>switched on for your account.
v said:
Great!
Looks as if I was close when I wrote:
>Double check with your provider that WiFi is
>switched on for your account.
Click to expand...
Click to collapse
Sure would like to learn and know how and why the sim card plays a roll when you are trying to get wifi calling working. In my simple world, it's a working unlocked phone, a wifi connection, and the software on your phone to get this working.
Holly crap! Been using wifi calling successfully for the last day. OK so now I want to go back to regular phone service with phone providers. And you would think you could follow the steps at #7 and stumble your way to getting regular phone service, right. Nope, following the steps laid out will not do the trick. Now I got to figure out how to do it.
Any help on this? The Mobile Network option in Network & Internet is grayed out. Also the + sign does nothing. Turning off Wi-Fi does nothing to.
(Hoping the Hotspot & tethering is easier than wifi calling. I'll be in trouble if it's not.)
i don't have wifi calling on this phone but do on my note 10 plus,is it just in usa?
Us3r_1 said:
..
.OK so now I want to go back to regular phone service with phone providers. And you would think you could follow the steps at #7 and stumble your way to getting regular phone service, right.
...
Click to expand...
Click to collapse
All I had to do was enabling Wifi-Calling in my phone and call the phone company to enable Wifi-Calling.
As soon as I am out of reach of my Wifi, it switches automatically to GSM or LTE (my contract does not provide me with 5G).
In other words: No need to change any settings.
Same if I disable Wifi manually. The phone shows LTE the same second.

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