Mate 9 not receiving calls - Huawei Mate 9 Questions & Answers

Hi I have a Mate 9 that is not receiving some calls, I'm not sure why but people will say they tried calling me when I haven't received any calls. I'm using T-mobile and the U.S version of the mate 9. Has anyone else had this issue or have a fix?

I guess you could check Settings - Battery - Battery usage details to see if Mobile Network has any gaps in it.
Could be a "loose" sim card. My Note 4 had this problem where it would drop and only a reboot would resolve it.
Don't know if that was hardware or software related though.

Check if harassment filter is enabled?

Phone app - More... icon - Harassment filter - Settings icon,
check "Number blacklist" & "Notifications".

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Nexus 5 Calls Not Connecting

Anybody has problems with Calls not connecting on Nexus 5 even when the phone is showing full signal? I have been having this problem for a long time! I dial any number then even before the dialing tone starts the call simply disconnects!
I've never had this problem. Here are the suggestions I can come of:
- Use the default caller app if you're using a third-party one.
- Enter safe mode to see if any apps are interfering with calling.
- Google if other people are having the same problem as you with your telephone provider.
- Reset app and cache data for your caller app (I reckon this may delete things like call history and perhaps even contacts, although I'd guess those are stored elsewhere).
- Reset the phone, preferrably after taking a nandroid-backup if possible.

SMS Delayed and Calls go Right to Voice Mail

Using the device on T-Mobile. Sometimes I'll just get a voice mail notification - without the phone ever ringing. Tested from a desk phone, and sure enough it goes right to voice mail without ever ringing. If I make a call outbound from the Zenfone 6, it will always work. Then I'm able to receive calls for an unknown amount of time. I can reboot and get calls after the reboot, but they will eventually randomly stop.
SMS also come though delayed by hours. For instance someone sends a SMS my way at 2pm, I'll get it at about 4pm. If I send a SMS out bound, I then instantly get all the inbound ones.
Anyone know if I need to whitelist something in battery optimization? So far the Zenfone isn't really good at being a phone. - great at everything else though.
Check your apn settings I think I had to update the default to whatever BYOD APN settings are for T-mobile see if it helps you
Also had this issue on T-Mobile. If APN settings don't fix it, I'd go to Auto-start Manager in Settings > Battery > PowerMaster and allow your messaging apps to run.
For me, I'd get SMS messages only when my screen was on, and some weren't received from contacts, like it shuts the apps off after not using them.
Same here. I'm about to switch providers because of this. What rom are y'all using? I'm on LineageOS 16. @wreid23 can you post your APN settings?
Tried unoptimizing all the messaging related apps, no effect.
progman32 said:
Same here. I'm about to switch providers because of this. What rom are y'all using? I'm on LineageOS 16. @wreid23 can you post your APN settings?
Tried unoptimizing all the messaging related apps, no effect.
Click to expand...
Click to collapse
Im on vanilla with rooted boot img
APN SETTINGS:
https://support.t-mobile.com/docs/DOC-2090
So I found that if I turn off WiFi calls come right through. I don't know what the fix is, but I guess that's my work around.
TopHATTwaffle said:
So I found that if I turn off WiFi calls come right through. I don't know what the fix is, but I guess that's my work around.
Click to expand...
Click to collapse
I've found the same to be true for me. Wi-Fi connection prevents calls from coming in. I can dial out just fine.
This is extremely strange since this phone is not even Wi-Fi calling certified and it's not even a feature. This has been my biggest issue with the phone so far because you never know if you miss a really important call.
enkryptik said:
This has been my biggest issue with the phone so far because you never know if you miss a really important call.
Click to expand...
Click to collapse
I purchased a OnePlus 7T for this reason. Can't use this device anymore after getting flack at work for missing and oncall issue due to the phone not ringing because I left wifi on.
If you're having the same issues feel free to comment here:
https://zentalk.asus.com/en/discussion/15698/calls-not-received-texts-delayed
Redhawk2000 said:
If you're having the same issues feel free to comment here:
https://zentalk.asus.com/en/discussion/15698/calls-not-received-texts-delayed
Click to expand...
Click to collapse
Asus denies the phone could be the problem (despite the phone obviously being the only variable). I replied to that thread anyway, with my experience of similar lost calls on a Moto x4 with Wi-Fi calling enabled. Maybe it'll give some engineer at Asus a push in the right direction...
if any of you are rooted there is an alternative for now to enable volte and vowifi: https://forum.xda-developers.com/rog-phone-2/how-to/guide-enabling-volte-vowifi-v2-t4028073
TopHATTwaffle said:
I purchased a OnePlus 7T for this reason. Can't use this device anymore after getting flack at work for missing and oncall issue due to the phone not ringing because I left wifi on.
Click to expand...
Click to collapse
I'm having the issue with T-Mobile 7T Pro, when I got the permanent unlock approval and switched to Mint Mobile sim is when calls went to voice mail, have you found a solution yet? Phone works fine if I use T-Mobile sim, but Mint Mobile sim in the 7T Pro is when the calls go to voice mail and text don't go out, if I put the Mint mobile sim into a Pixel XL all is fine. When I had to quit Mint Mobile becasue of this and go back to T-Mobile on prepaid again, all worked well.
The zenfone 6 is getting volte with the android 11 update so hopefully that fixes this issue
Sent from my ASUS_I01WDX using Tapatalk

Question No Caller ID when using 4G/5G

As the title says I'm having trouble when using 4G/5G. All incoming calls are shown as Unknown. When you force 3G/2G only, caller number is displayed normally. Searching google there are many reports with other phones as well having this issue when used with VoLTE and most of them were fixed with software updates. So I contacted my carrier and told them to disable VoLTE from their side. Unfortunatelly I have no slider in Sim settings to disable VoLTE myself.
After VoLTE was disabled from my carrier all incoming calls were displayed normally. It's not the best solution cause I bought this phone specificaly for this reason, to use VoLTE/VoWifi.
I posted the issue on bug tracker of realme as well.
Currently I'm on A.05 version and I have no idea how I could change to another version to test if it would work.
Any help would be appreciated regarding this issue.
PS. I tried factory resetting several times. Clear data/cache of phone/contacts app as well and tried with another dialer.

Incoming/Outgoing calls frequently stops on OP7

I am on the latest update of OP7 . I have noticed, that often I lose the ability to make or receive calls. If I call any number, it will disconnect with one tone, incoming callers hear my phone is switched off. Although I never notice this as my phone shows full network coverage unless I make a call myself. I have to toggle airplane mode to fix this or clear the phone management system app. I am not the only one who is facing this issue, other users facing the same. I do not think this is a hardware issue, but more like a software issue (I have a feeling it has been deliberately done, to force users to upgrade).
wickedspice said:
I am on the latest update of OP7 . I have noticed, that often I lose the ability to make or receive calls. If I call any number, it will disconnect with one tone, incoming callers hear my phone is switched off. Although I never notice this as my phone shows full network coverage unless I make a call myself. I have to toggle airplane mode to fix this or clear the phone management system app. I am not the only one who is facing this issue, other users facing the same. I do not think this is a hardware issue, but more like a software issue (I have a feeling it has been deliberately done, to force users to upgrade).
Click to expand...
Click to collapse
Just Format your device for once and it will be fixed

Question Google phone app - filter spam calls not working?

Hi all,
I have a xiaomi redmi note 11 pro plus 5g, with the latest global rom (13.0.3.0 SKTMIXM, android 12) <-- update: just found it's the mediatek version (thank you xiaomi for calling different mobiles in the same way), so sorry to having written in the "wrong section of the forum", however I think the issue is in the google app itself.
Bootloader was not unlocked.
I'm having an issue with filter spam calls in the google phone (dialer) app.
As you may know, in the google phone app settings -> Caller ID and spam, you have:
1. See caller and spam ID
2. Filter spam calls
I have both enabled.
After the app upgraded from playstore, it seems the filter is not working anymore, meaning that spam calls are advertized as "spam" when my mobile rings (yes, the mobile rings), i.e. the calls are not automatically rejected and saved in calls history: it's like that only the first toggle (See caller and spam ID) is enabled.
The google phone app (com.google.android.dialer) version is 92.0.484272277.
The filter was working well on this phone with older versions, I think 2 versions older.
Anyone experiencing the same issue?
PS: I already tried to clean app data, but the result is the same
Try downgrading to older versions from August, it'll work. I had the same issue and this worked for me.
Thank you for your reply, that was what I did yesterday, now waiting for spam calls to see if it works.
For what it's worth I opened an issue in the google phone app community, the issue was escalated and they are saying they are looking into it; I also sent a logcat log to a gmail address they opened on purpose.
It's definitely a bug in the app.
I got a few spam calls a few days ago by the way, I can confirm it totally works!

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