HTC M8 Sprint 831c Network/WiFi/Bluetooth Problem - Sprint HTC One (M8)

Hello Everyone
I have HTC M8 Sprint 831c US unlocked mobile, recently i have updated my Device with Marshmallow. My mobile got some network issue, sometime i can not make a call and sometime my device is unreachable when device got full range. I have also WiFi / Bluetooth issues, I got weak signals. Please help me ......

Even I'm facing the this issue. However, not with Wifi/bluetooth.
I'm generally getting this issue when the network Icon shows 3G.
For now i have switched my network mode to GSM only from *#*#4636#*#* and am able to solve the issues. Still looking for the 3G fix.
Am testing a couple of things and will update if any of those works.
Meanwhile, check in this thread and see if all your band are unlocked.
http://forum.xda-developers.com/sprint-htc-one-m8/general/enabling-3g-umts-countries-t2847461

Related

[Q] LTE Issues or not? What do you guys think?

So to start out, this is my 3rd HTC ONE. First one had a bad camera. The next one was a refurb with a screen burn-in problem.
I'm now on my 2nd refurb, everything looks good and checks out, but I'm noticing that I'm not connecting to 4G. Like, ever. I've called Sprint and their reply is that I'm on in a fully launched LTE market, which is true. But on my commute to and from work every day I connect to a minimum of 2 towers with LTE, using both my old GS3 and the first 2 HTC ONES that I had.
Also in settings -> about -> network it's showing CDMA rev A instead of the usual eHRPD that has shown there for months, even before LTE towers started coming up.
So I'm 99% convinced something is wrong with the radio on this phone.
Do you guys think the same? All the settings are in place for LTE to connect. My SIM (UICC) number is in Sprints system, my network mode is LTE/CDMA, I've updated PRL and Profile about 10 times each. I've toggled airplane mode numerous times near the towers I know have LTE. I'm just at a loss here, and I'm sick of these crappy refurbished phones!
Thanks guys.
It must be the phone my phone has a similar problem by not connecting 3G only 1x and LTE. Take it to a sprint store and see what they say about it.
Sent from my SPH-L720 using xda premium

[Q] Radio favours 2G...

My phone will not use 4G (HSPA+ or 3G) at my work indoors and favours 2G. My HTC Sensation could be made to use 3G by cycling the radio off/on - but this HTC One is not able to get any 3G plus. I assume this is not a ROM issue as it behaved exactly the same on the original US T-mobile ROM build. Just outside the building (and always at home) I get 4G (not LTE but T-mobile HSPA) speeds (slow here at around 4-6Mbps).
I know that settings can be changed to make the radio favour 3g/4G etc (even if a poor signal) but can anyone help here. I can sit the HTC One right next to the Sensation and the Sensation will show 3G with 1-2 bars and the One will show 4-5 bars with 2G! (and very poor data rates on the HTC One as you'd expect).
I am on a US T-Mobile model on 10.1 ROM with new radio (4A.16.3250.24_10.38.1150.03.zip) - VERY impressed.
tony.wheeler said:
My phone will not use 4G (HSPA+ or 3G) at my work indoors and favours 2G. My HTC Sensation could be made to use 3G by cycling the radio off/on - but this HTC One is not able to get any 3G plus. I assume this is not a ROM issue as it behaved exactly the same on the original US T-mobile ROM build. Just outside the building (and always at home) I get 4G (not LTE but T-mobile HSPA) speeds (slow here at around 4-6Mbps).
I know that settings can be changed to make the radio favour 3g/4G etc (even if a poor signal) but can anyone help here. I can sit the HTC One right next to the Sensation and the Sensation will show 3G with 1-2 bars and the One will show 4-5 bars with 2G! (and very poor data rates on the HTC One as you'd expect).
I am on a US T-Mobile model on 10.1 ROM with new radio (4A.16.3250.24_10.38.1150.03.zip) - VERY impressed.
Click to expand...
Click to collapse
Hey Mate,
I was also facing same kind of wiered issue, I am on Developer edition and In India and initially Was not not able to connect to any 2G network. I tried everything from Custom ROM to STOCK ROM, Radio, SIM card change, orperator change etc.... but mothing worked. I was only able to connect to 3G networks.
Today finally I S-OFF'ed my ONE and after that it's connecting to 2G and 3G both networks. I think there is something related with security.
Try to S-OFF !!
mahesh_9j said:
Hey Mate,
I was also facing same kind of wiered issue, I am on Developer edition and In India and initially Was not not able to connect to any 2G network. I tried everything from Custom ROM to STOCK ROM, Radio, SIM card change, orperator change etc.... but mothing worked. I was only able to connect to 3G networks.
Today finally I S-OFF'ed my ONE and after that it's connecting to 2G and 3G both networks. I think there is something related with security.
Try to S-OFF !!
Click to expand...
Click to collapse
Thanks - but I can get 3G and 2G signals now. It is just that the phone seems to significantly favour the stronger 2G (more stable) connection even though a low signal strength 3G connection can be achieved (as shown on my Sensation). I do not want to try S-off just yet as that should really only allow the changing of H-boot and radio firmware etc. I have never read anything that indicates that S-Off can improve a given (un-changed) radio. It is this method I want to try first - I am already on the .24 radio but that made no changes.
I do know that it is possible to access a hidden (HTC Engineer?) radio menu by typing a series of numbers and hash (#) symbols into the phone dialler - that reveals a menu in which (I believe) you can change the priority of network selection.
It could, of course, just be that the HTC sensation radio hardware is better than the HTC One - I hope not.
Regards

HTC One M8 reception worse than M7

I just got my new M8 today. Did the update, activated it, did the profile & PRL update, etc.
I am constantly getting the message that I am roaming on data. It seems to go back and forth between roaming and not roaming. Even outside I only get 1 bar of LTE and the LTE signal is a good 10dBvm worse than my old M7. My M7 never switched to roaming in the same location.
Anyone else noticing worse reception on this phone than the old HTC One?
I'm having the same issue.
Sent from my 831C using Tapatalk
I was worried bout the same myself. In the office with the M7, I wan't able to get LTE, but luckily with the M8 I am able too. I would have your phone checked at a corporate Sprint Store to see if it's faulty
kwolf said:
I just got my new M8 today. Did the update, activated it, did the profile & PRL update, etc.
I am constantly getting the message that I am roaming on data. It seems to go back and forth between roaming and not roaming. Even outside I only get 1 bar of LTE and the LTE signal is a good 10dBvm worse than my old M7. My M7 never switched to roaming in the same location.
Anyone else noticing worse reception on this phone than the old HTC One?
Click to expand...
Click to collapse
I had the same issue yesterday when I upgraded my radios to the new version (1.54). I was stuck in 3G roaming at my house which was normally low end LTE service before the upgrade. After flashing the radios I did a Profile and PRL update using WIFI, then restated my M8. After the restart I am back to having LTE coverage floating around -90-95 dBvm. I also notice that if LTE fails to connect swithing airplane mode On/Off helps as well as dialing *18 from the dialer. Hope it helps.
captain008 said:
I had the same issue yesterday when I upgraded my radios to the new version (1.54). I was stuck in 3G roaming at my house which was normally low end LTE service before the upgrade. After flashing the radios I did a Profile and PRL update using WIFI, then restated my M8. After the restart I am back to having LTE coverage floating around -90-95 dBvm. I also notice that if LTE fails to connect swithing airplane mode On/Off helps as well as dialing *18 from the dialer. Hope it helps.
Click to expand...
Click to collapse
I already did the profile/prl updates, and my phone isn't stuck on 3G. It will go 3G roaming, then 3G on sprint, then LTE. Seems to not be able to make up its mind. On my old phone it would usually toggle between LTE and 3G in this area, but NEVER did it go roaming. Even when I'm on WIFI I still get the annoying roaming notification in the notification bar every 5 minutes.
I also noticed my WiFi download speed on wireless AC is significantly worse than my M7. I used to be able to get 70mpbs on a speed test, this phone won't even break 12mbps. When I first turned the phone on it would only work on WiFi for the first 3 seconds after connecting and then it would stop. I had to keep connecting and disconnecting to WiFi to limp the software update download along. After it updated it at least stays connected and working on WiFi, but a lot slower than my old M7.
This phone was purchased on a SWAC account so I'm not sure if a Sprint store (which is 40 minutes away for the nearest one) would swap it for me.
Moved to Q&A...all questions should be posted in Q&A.
Thank You,
BD619

No LTE and delayed SMS

Over the last few days I have had no LTE (Only 3g) and SMS have been delayed getting sent. Im in the Minneapolis area. Anybody have the same issues or have a solutions I can try. I have tried updating the profile and updating the PRL. Any help is appreciated.
My area was riddled with that for months, turns out Sprint was upgrading the towers for circuit switch fall back. A good way to see if this is the case put your M8 in LTE only mode (dial *#*#4636#*#*) and select LTE only. If your connection comes up with LTE then that is the case. I would also try and update your profile and update the PRL sometimes that helps with connection issues.
I tried the Testing mode and get no signal when i put it in LTE mode.
Thats is no bueno, the only other thing I would suggest is calling Sprint and have an engineer check out your towers.

[Q] No sims working Out of service

I have htc one m8 sprint unlocked it was working fine for 2 months then suddenly it stopped working . now in 'about device'.
I get, Network-Unknown
Signal Strength -0
Cellular network type-not available
Service State - out of service
Roaming - not roaming
Bluetooth address-Unavailable
Hi, thank you for using XDA Assist. I would try a new sim first. But you might have a hardware issue. I'm going to move your post here, http://forum.xda-developers.com/sprint-htc-one-m8/help were others with your devie may help.

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