Not Able To Make Calls - LTE Only - One (M9) Q&A, Help & Troubleshooting

So I converted my phone from AT&T to developer edition, flashing an RUU.exe. Everything worked fine, updated to latest 5.1. But I noticed I couldn't make calls. So I checked the menu *#*#4636#*#* and noticed under phone it was set to LTE Only. Changed it and I could make calls.
Posting just in case someone else runs ito this problem (Apparently no Voice over LTE in Harrisburg, PA.)

I don't think there are any carrier that support Voice over 4G/LTE yet.

Related

Can't recieve incoming calls our call out unless on EDGE

I have just received an i747 from a friend and had unlocked it to be able to use my T-Mobile SIM. Now the phone works but I cannot call out OR receive calls unless the phone is on EDGE. If it has a 3g connection I cannot call out or receive calls for some strange reason. When I try to call out it will not ring and hang up after about 20-30secs. I can also not if I turn the data off completely.
The IMEI does match the back off the device and i have system reset the device. I tried it while on: stock unrooted 4.1 / 4.4 , stock rooted 4.4 , and a custom rom (currently SlimKat). They all do the same thing.
Any fix for this would be great. My best guess is there is something wrong with my efs folder but everything seems to be there so I am not sure.
At the very least is there a way to disable 3g all together leaving only Edge and LTE? Although this is a last resort.
Thanks.
Edit: I forgot to mention that messaging and data connectivity work absolutely fine and I haven't had a problem with that.
Does T-mobile use AWS in your area? I read that AWS has to be renabled each time you start/restart the phone. The i747m (Canadian version) software doesn't natively support AWS.
if thats the case found this
http://forum.xda-developers.com/showthread.php?t=2344627
"all i can really do , is stay out of my own way and let the will of heaven be done"
Is there a chance the dropped calls could be due to an incorrect APN setting?
^^I thought APN settings affect data only and network type (gsm, wcdma) affect voice calls.
audit13 said:
^^I thought APN settings affect data only and network type (gsm, wcdma) affect voice calls.
Click to expand...
Click to collapse
You're correct, once again I put mouth/fingers in motion before fully engaging brain. APN does control data, internet, mms, etc. I guess I was thinking AWS was related to data frequencies instead of voice frequencies.
^^ No worries. We're all here to learn from each other.

Can't place or receive calls; LTE data and SMS works fine

Hey guys, just unwrapped my new N5x and popped in my sim card. Yet for some reason I can't make or receive any calls!
Calls to me go straight to voicemail, and when making an outgoing call it either immediately says call ended or after a while says network unavailable.
The strange thing is that the entire time I'm connected to LTE (full bars) and data works fine (I can use chrome), and I can even send and receive SMS!
It's been like this straight out of the box. I reset the network settings, then factory reset the device, then upgraded to 6.0.1, rinsed and repeated with no luck.
Probably related: I tried setting the phone from LTE preferred to 3G or 2G but it still says connected to LTE. Even did it manually from the *#*#4636#*#* and nothing changed.
I'm using HOT Mobile in Israel and the American version of the phone. All bands are here are supported.
Any thoughts on how to proceed?
Do US specifc models of phones normally work fine in Israel?
I know I had these symptoms when I managed to accidentally swap my UK model to use USA bands. Only potential difference is that I don't think SMS worked for me.
If someone more knowledgeable knows where the "Network settings reset" pulls values from and to, that might help.
Or which partition holds the data that makes a US phone a US version and an EU phone an EU version (assuming it isn't hardware), we could potentially flash stuff.
Yeah they do. I have a friend with a 5x and his phone is working fine. :/
Check your apn settings, re add them again to test.
Maybe your network do not support lte calls, try it on 3g. This was my solution even thought my network supported volte and worked on s6 but not on my 5x.
I see you tried the 3g option, my problem was another app causing the conflict between lte and 3g. Able to source for another spare sim to try?
I deleted the apn settings - no luck. tried 2 different service providers and same results with both
I havnt installed anything yet and wiped the phone to be sure. Could a stock app be causing the conflict? How can I check?
did you try having your friend put his sim in your phone and yours in his to see if it works?
Yep - he's on the same service provider that I am. Didn't work. Also tried a Sim card from a different service provider.
Here is a solution if you still need it http://forum.xda-developers.com/showpost.php?p=64023143&postcount=10

6.20.502.5 ATT Firmware

Hi All,
Has anyone extracted the the firmware from the RUU? I did a quick search and just saw one with the HBOOT. Also has anyone installed the HTC RUU? Is it any good?
Thanks in advance.
Here
http://forum.xda-developers.com/showpost.php?p=66871005&postcount=13
Of course wnc and ckpv5 would be involved!
Guess I should have looked a little harder than searching by the numbers!
Many thanks!
Sent from my SAMSUNG-SGH-I747 using XDA-Developers mobile app
If anyone is looking for an already modified version of the 6.20.502.5 firmware. I removed the boot.img and the recovery.img file and replaced the hboot file with one that has no red text. This firmware works fine on the AT&T and Developer's Edition models.
Download here.
Hey everyone in this post,
Please check to make sure that you are receiving voice calls. I just discovered that I can make outgoing calls just fine however ALL incoming calls are going directly to voicemail. I'm going to do a little more research but it looks as though I'll need to revert to an earlier firmware. I'm guessing this has something to do with HD Voice.
A couple more things of note: I'm on the latest version of ARHD which is 53.1 (MM); texts work fine both ways; data is fine; voicemail functions fine. Just to give a little background.
ccw1134 said:
Hey everyone in this post,
Please check to make sure that you are receiving voice calls. I just discovered that I can make outgoing calls just fine however ALL incoming calls are going directly to voicemail. I'm going to do a little more research but it looks as though I'll need to revert to an earlier firmware. I'm guessing this has something to do with HD Voice.
A couple more things of note: I'm on the latest version of ARHD which is 53.1 (MM); texts work fine both ways; data is fine; voicemail functions fine. Just to give a little background.
Click to expand...
Click to collapse
I'm having the same problem. I fiddled with the APN settings and it seemed (I'll try again) to fix that issue. Meaning I manually entered the APN settings and I was able to receive calls. A bit ridiculous.
Edit: It's not the APN Settings that helped. It's actually switching the preferred network from LTE to 3G or maybe even 2G. Haven't checked it on 2G.
garekinokami said:
I'm having the same problem. I fiddled with the APN settings and it seemed (I'll try again) to fix that issue. Meaning I manually entered the APN settings and I was able to receive calls. A bit ridiculous.
Edit: It's not the APN Settings that helped. It's actually switching the preferred network from LTE to 3G or maybe even 2G. Haven't checked it on 2G.
Click to expand...
Click to collapse
I finally got mine working but I have no idea what the magical combination ended up being. I did downgrade to a previous 6.12 firmware but that alone didn't do the trick. I also manually added a new APN in addition to many other things one by one. I was actually on an outgoing call and my line beeped because I had a call waiting! I was so shocked (and pleased) that I hung on the person I was speaking with and answered the call. From then on it has worked fine. Having said that I'm going to sit tight with the phone the way it is until someone much smarter than me lays out a solid plan.
I'm glad you got beyond your problem as well :good:
ccw1134 said:
I finally got mine working but I have no idea what the magical combination ended up being. I did downgrade to a previous 6.12 firmware but that alone didn't do the trick. I also manually added a new APN in addition to many other things one by one. I was actually on an outgoing call and my line beeped because I had a call waiting! I was so shocked (and pleased) that I hung on the person I was speaking with and answered the call. From then on it has worked fine. Having said that I'm going to sit tight with the phone the way it is until someone much smarter than me lays out a solid plan.
I'm glad you got beyond your problem as well :good:
Click to expand...
Click to collapse
Are you still able to receive phone calls while on 4G? Any further issues? I asked because ever since upgrading to LP firmware I no longer can receive incoming phone calls while on 4G but I can make calls. I have noticed that while on a call on 4G I can receive calls which is strange. So I have to stay on 3G to receive all incoming calls. Any ideas on a fix? Thanks
Sent from my HTC One_M8 using Tapatalk
makaveli0622 said:
Are you still able to receive phone calls while on 4G? Any further issues? I asked because ever since upgrading to LP firmware I no longer can receive incoming phone calls while on 4G but I can make calls. I have noticed that while on a call on 4G I can receive calls which is strange. So I have to stay on 3G to receive all incoming calls. Any ideas on a fix? Thanks
Sent from my HTC One_M8 using Tapatalk
Click to expand...
Click to collapse
Your situation does sound similar to mine. Whatever combination of zany things that happened for me as forced my network into HSPA+ whereas it used to read LTE. I'm not referring to the icon in the status bar (that still reads 4G). If I go into Settings>About>Network>Cellular network type. That's where I see HSPA+, HSPA or HSPAP depending on where I am. My speeds are WAY slower but it's still functional, yet there's something obviously still broken. Since I can receive calls now I've decided to just "live with it" until I come across a proper solution that I know will work. If that day should ever come though, I'll be sure to post back here.
Update:
I am back to my "Cellular network type" displaying "LTE" and my download speeds also confirm this. Below are the additional steps I took to get to this point:
1. In the phone dialer enter *#*#4636#*#* (takes you to a "Phone info" screen)
2. Scroll down to "Set preferred network type" (take note of its current selection in case you need to go back)
3. Using the dropdown, select GSM/WCDMA/LTE auto
That's it. After a few seconds my data icon refreshed and I knew I was good to go. For good measure I went back to Settings>About>Network to verify my Cellular network type. Good luck.
ccw1134 said:
Hey everyone in this post,
Please check to make sure that you are receiving voice calls. I just discovered that I can make outgoing calls just fine however ALL incoming calls are going directly to voicemail. I'm going to do a little more research but it looks as though I'll need to revert to an earlier firmware. I'm guessing this has something to do with HD Voice.
A couple more things of note: I'm on the latest version of ARHD which is 53.1 (MM); texts work fine both ways; data is fine; voicemail functions fine. Just to give a little background.
Click to expand...
Click to collapse
AT&T's deployment of Voice over LTE (which they've branded "HD Voice") does not play well with international-based custom ROMs (basically, most any ROM that is not ATT based). Issues with voice calls is the common symptom.
Best workaround is to call AT&T and ask them to turn off HD Voice for your account (may need to ask for 2nd Tier tech support before you get someone who knows what you are talking about). Yes, you can turn off LTE, but that is obviously not a great option.
Other fixes (APN, firmware) are likely placebo effect at best. Went down a similar path trying to troubleshoot this problem for folks a year ago, before coming to the conclusion (Post #9): http://forum.xda-developers.com/att-htc-one-m8/help/incoming-calls-lte-mode-m8-att-arhd-34-0-t3026710

Strange bug: Data (LTE) is fine but no call or sms

I am using a HTC 10 phone au kddi Japan variant. Got success in converting the phone to international but have been rocking custom ROM for a while already now. Bootloader unlocked, S-OFF (obviously). Been running the custom ROM Viper ROM ok for a while but when I converted to the WWE this strange bug happened. I got data, LTE, good connection but no call or sms and it said No service despite the carrier showing up in the menu. Huge thanks if anyone can help me
I got this OP3 that made me change it to the HTC 10. The Problem of it may give you an explanation.
It couldnt Lock signal on LTE and was returning to Edge So you had to press *#*#4636#*#* and select the Network type to LTE only.
However although the phone locked LTE for good then it couldnt make any phone calls or txt msg.
I had to choose LTE/CDMA or LTE/GSM
In Order to change while in call to Edge or "H+" Network.
I guess by that we understand that LTE is only for DATA and not for Voice calls and txts...?
Hope i helped...
kanth1991 said:
I got this OP3 that made me change it to the HTC 10. The Problem of it may give you an explanation.
It couldnt Lock signal on LTE and was returning to Edge So you had to press *#*#4636#*#* and select the Network type to LTE only.
However although the phone locked LTE for good then it couldnt make any phone calls or txt msg.
I had to choose LTE/CDMA or LTE/GSM
In Order to change while in call to Edge or "H+" Network.
I guess by that we understand that LTE is only for DATA and not for Voice calls and txts...?
Hope i helped...
Click to expand...
Click to collapse
Yeah, I tried your method but it didn't work. Don't really understand why that happen tho because if I have the right radio to have LTE then why can't I do call?

M8 does not receive calls on 4G, works when I switch it to 3G.

I have a HTC One M8, AT&T, TWRP recovery, flashed and rooted with ICE 8.2.2; SuperSu.
When I am connected to 4G/LTE and someone calls me, it rings on their end but my phone does nothing. I checked my IMEI and see LTE is supported. When I switch my mobile network from 2G/3G/4G (auto) to 2G/3G (auto), it connects (H, H+ icon) and my phone receives incoming phone calls. My SIM card does not mention "4G" or "LTE". I have yet to try the SIM in another phone yet but plan to tonight.
Just to help me out with my thought process on figuring out the issue I'm going to think out loud for a second:
Put my SIM in another phone and make sure 4G/LTE is on, check if it receives calls. If it works, the issue is my phone or ROM. If it doesn't work, SIM card is the issue.
Also, from what I understand, phones on 4G switch to 3G when a call comes in and my phone may not be doing that. Is there a fix for this?
EDIT: As additional info, I am able to make outgoing calls without issue on 4G.
Are you actually using AT&T as your cell provider?
Yes, and I made sure my APN settings are correct.
It's a known issue. AT&T's implementation of Voice over LTE (VoLTE) which they call "HD Voice" for some reason interferes with voice calls on custom ROMs on this device.
No real fix, aside from calling AT&T and asking them to turn off the HD Voice feature of your account. May need to ask for a 2nd Tier tech support to do it. Others here have posted they had to do that (and 1st Tier either had not clue what they were talking about, or wrongly claimed it can't be turned off).
Other threads discussing the issue:
https://forum.xda-developers.com/showpost.php?p=62001970&postcount=28
https://forum.xda-developers.com/htc-one-m8/help/receive-calls-make-detailed-thread-t3146670
https://forum.xda-developers.com/htc-one-m8/help/m8-receive-calls-flashed-wrong-rom-4g-t3365488
https://forum.xda-developers.com/htc-one-m8/help/phone-receiving-calls-help-appreciated-t3382019
Awesome. Thank you!
EDIT: Just finished working through the issue with an AT&T rep through online chat. Had me turn off my phone, disabled it on their end, and turned it back on. Did a test call and sure enough 4g switches to 3g as the call comes in and switches back afterwards. Problem Solved!

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