yashsingh1/xdaforums huggingface dataset:
[Verizon HTC One (M8)] Janhaus:
Quick q for everybody following this thread, I did the instructions shown here:

http://xdaforums.com/showthread.php?t=2708628

Then booted into TWRP and installed ARHD 5.5 (http://xdaforums.com/showthread.php?t=2694917)

Then I rebooted...and the screen is stuck on the white HTC One screen.

I confirmed that the phone is S-Off if I force a reboot and go into the bootloader, are there any additional steps I should be taking that aren't mentioned in the instructions, i.e. changing CID to 11111..., wipe cache after install, etc.? Trying to figure out what's not working for me.

Update: Tried changing CID to super CID (all 1's) and then reflashing rom and reboot. Waited 15 min, no change in status. Trying a diff rom now...
[Verizon HTC One (M8)] Runell A.:
I'm having the same problems also... getting stuck on the same screen.... any progress?
[Verizon HTC One (M8)] Janhaus:
So I finally gave up on ARHD5.5 after the third try waiting for 10+ minutes each and went with the Viper rom that somebody mentioned on this thread and got it working!
[Verizon HTC One (M8)] Runell A.:
Is everything working? Trying to run the verizon M8 outside the states... and I can't get the mms to go thru. Also I find the data keeps cutting in and out. That's why I wanted to convert it.

Why did you choose Viper and not Insert Coin instead? (just cuious)
[Verizon HTC One (M8)] Runell A.:
Guess I'll ask this to anyone who's installed the Viper ROM as opposed to the ARHD ROM....
[Verizon HTC One (M8)] bonbon363:
I am running VIperOne M8 Rom on Tmobile and is experiencing issue with Mobile Network dropping since released. I have asked in Q&A section, no answers so far.

A phone reboot fixes this problem.

No problem on wifi tho.
[Verizon HTC One (M8)] Runell A.:
This is one of the reasons that I want to Flash a rom on my phone. The way it is now, the stock rom drops data once in awhile as well.
[Verizon HTC One (M8)] kingkard:
Iposted 1 topic as well in question answer, no solution. But a little trick is that u only need to on and off airplane mode for it to refresh the signal.

Still w8ing for a roms that can fully fix signal dropping.
[Verizon HTC One (M8)] t2abousa:
Same issue, did you figure it out? it works on t-mobile sim so I couldnt understand why it wouldnt on Wind sim.
[Verizon HTC One (M8)] dunn816:
Just to be ultra clear lol Im on a verizon htc m8 but Im using a h2o sim which is kinda like att. Everything works except mms and the data drops on soft reboot and I have to do a full reboot to get data back. That's with stock everything except im s-offed & rooted.

I already have twrp recovery installed and Im rooted and everything. So my only step would be to Flash ARHD and the kernel mentioned in the thread update? :confused:
[Verizon HTC One (M8)] dunn816:
Just to be ultra clear lol Im on a verizon htc m8 but Im using a h2o sim which is kinda like att. Everything works except mms and the data drops on soft reboot and I have to do a full reboot to get data back. That's with stock everything except im s-offed & rooted.

I already have twrp recovery installed and Im rooted and everything. So my only step would be to Flash ARHD and the kernel mentioned in the thread update?
[Verizon HTC One (M8)] Runell A.:
Good luck! let me know if it works for you
[Verizon HTC One (M8)] rsach:
call end issue

I followed the instructions and everything works, however every once in a while it won't let me dial a number, there is an x on the signal bar the call ends right away. I have to enable airplane mode and then disable it and then I get the service back. Is anyone else having the same problem
[Verizon HTC One (M8)] dadmi:
Yes. It's a known issue.
[Verizon HTC One (M8)] cuoreesitante:
Tasker

I wonder if using Tasker to enable/disable airplane mode on a timer is a viable solution.....

Found this post that looks like it might do the trick:

https://groups.google.com/forum/#!topic/tasker/n-kzhjEwrJA

basically Tasker will enable Airplane mode if it detects that there is no cell service, then disable it after a set period of time.
[Verizon HTC One (M8)] carosp:
Thank you Guys. This post was very helpful for me!!!
[Verizon HTC One (M8)] shery_911:
Htc m8 lte
[Verizon HTC One (M8)] aer0zer0:
I am using net10 (same difference). Give the digital high GPE A shot. My mms, data, and everything else is working perfectly. I didn't know art had such decent service where I live. It's great
[Verizon HTC One (M8)] iweksler:
Anybody tried to use the latest ARHD 8.1 (International) combined with the latest Elemental X 0.19?
[Verizon HTC One (M8)] Roefastford:
Does this work for verizon m8 to at&t also ? Also is it possible to get at&t lte on a verizon m8 ? Not sure how all this works as far as the m8's are set up, but are the data bands that an m8 picks up done 100% through software or is there an actual mechanical difference inside the m8 that determines what data bands ( which carriers data ) it can use ? Anyone ?
[Verizon HTC One (M8)] iweksler:
2G Network	GSM 850 / 900 / 1800 / 1900

3G Network	HSDPA 850 / 900 / 1900 / 2100 - EMEA, Asia

HSDPA 850 / 1900 / 2100 - AT&T

HSDPA 850 / 1900 / 2100 - Sprint

HSDPA 850 / 900 / 1900 / 2100 - Verizon

HSDPA 850 / 1700 / 1900 / 2100 - T-Mobile

4G Network	LTE 800 / 900 / 1800 / 2600 - EMEA

LTE 700 / 1700 / 2100 - T-Mobile

LTE 700 / 900 / 1800 / 2100 / 2600 - Asia

LTE 700 / 850 / 1700 / 1800 / 1900 / 2100 / 2600 - AT&T

LTE 800 / 1900 / 2600 - Sprint

LTE 700 / 1700 / 2100 / 1800 / 2600 - Verizon

CDMA 800 / 1900 - Sprint, Verizon

CDMA2000 1xEV-DO - Sprint, Verizon

Those are the hardware specs of different brands of M8. The firmware supplied by the vendors/carriers is of course tailored to fit the hardware specs.
[Verizon HTC One (M8)] Roefastford:
I understand all that as that info is all available on the net. My question was not what are the bands, my question was can the bands be changed or is the actual hardware different in each carrier version ? Just like a computer can be run off of different operating systems such as windows or Linux, can the bands be programmed to change ?
[Verizon HTC One (M8)] iweksler:
No, that's not what it means. It means, for example, that Verizon's radio (which is part of the firmware) will handle LTE bands 700 / 1700 / 2100 / 1800 / 2600 MHz whereas Sprint - 800 / 1900 / 2600 MHz, Verizon and Sprint will handle CDMA whereas all other brands won't. Besides, greedy carriers (like Verizon, AT&T etc) may introduce filters into the hardware, to make it difficult for their brand to use competitor's SIM's.

Firmware is not like operating system (e.g. Windows). It's more like BIOS but much closer related to the HW. Like try to install a BIOS for the ASUS motherboard into a GIGABYTE one.
[Verizon HTC One (M8)] Roefastford:
So is the hardware inside all the m8's all the same then at least all the gsm versions and the world phones which that makes actually all of them, but of course not talking about using a non world gsm phone on a cdma network even though the gsm models can get some cdma data ? It all boils down to can a verizon m8 be made to work on all at&t bands ? To me if it is incapable of getting at&t lte then it would not be worth changing, not that hspa is not good because it is far better than 3g data but if no lte then I would not mess with it. I"am just tired of verizon being so greedy and feeling they dont need to compete with other carriers. I mean I can get straight talk with at&t service with unlimited talk & text plus 3 gb's of at&t lte data for $45 a month and metro pcs is unlimited the same for $40 a month with no taxes on top, and tmobile is the same and now lets you listen to all the music you want with no data usage, and verizon only wants to give me unlimited talk &text with only 1 gb of data for $60 a month which is using my own verizon m8 that I brought to the service. They verizon feel they have people over a barrel when truth is they dont as at&t is gaining ground on them. I think at&t should be allowed to merge with tmobile or another carrier to match verizon so verizon has to get off their high horse and be literally forced to compete or let that be their greedy downfall.
[Verizon HTC One (M8)] dj_spore:
I've been thinking about switching to a t-mobile straight talk sim, has anyone had any luck with AOSP roms? Is ViperOne still working out of the box if you select t-mobile as your carrier?
[Verizon HTC One (M8)] :
If you have the right tools i suppose as the hardware should be physically capable of using the bands (its not completely diff hardware) but there are security keys and such which you would have to go around/break into and the trouble of doing so really isnt worth the reward. Firmware hacking is technically possible, but it being possible and plausible are different. I wouldnt do it, id just sell/trade for the one i want.
[Verizon HTC One (M8)] Roefastford:
Ok so basically for it to even be done it would involve taking the phone a part and getting in to the phone like a jtag repair so for someone to do that would be costly if they even could figure it out, so yeah that would be a lot of expense and definitely not worth the cost. I guess if verizon does not work with me on some price matching of prices then I will sell it and just buy the at&t version.
[Verizon HTC One (M8)] iweksler:
Guys, I guess there is some misunderstanding. Verizon brand (SIM unlocked) with Verizon firmware (1.55.605.2 - the latest) will work with all sorts of SIMs/Carriers: US (GSM or CDMA), Asia, Europe - GSM/UMTS. Cuz if you look at the spec, Verizon covers most of the existing bands that other carriers cover. Firmware that comes out of Verizon must cover all the bands that are in it's spec cuz otherwise it's like cutting off it's own finger. They wouldn't do that even to spite a competitor. I personally use a Verizon brand phone to with a GSM/UMTS carrier SIM and it works fine. I haven't tried 4G - it's not yet available in my location - but I guess it'll work, if the band is supported.

The main problem with the firmware is that custom ROMs based on international firmware (like 1.54.401.10) may not fully support a Verizon device used internationally.
[Verizon HTC One (M8)] :
I was just answering the question about firmware hacking :P

Afaik I thought the m8 was a world phone on Verizon (so band support for many of the band's shouldn't be an issue)
[Verizon HTC One (M8)] TheCrazyDirectioner:
I'm wondering the same thing and likely have the answer. This thread is really unspecific as to what the "conversion" is. Basically it just disables CDMA and enables standard UTMS 3G. It does not enable the 1700MHz AWS HSPA band used by T-Mobile in refarmed areas, and by Wind on their

entire

network. With Wind being an only 3G AWS network, you NEED the 1700MHz AWS HSPA band in order it for it to work, unlike T-Mobile where in non-refarmed areas without 3G it just drops down to EDGE.
[Verizon HTC One (M8)] loser:
This does not work for me

The Elemental Kernel method does not seem to work for me . Still having wifi issues with GSM ROMs like the latest 2.22.401.4. This is what I have done :

1. Factory Reset

2. Install ROM

3.Install Kernel

4. Wipe Cache

5.Wipe Dalvik

Still no luck ...

I am S-off and bootloader unlocked.

Any ideas ?
[Verizon HTC One (M8)] masteris:
Convert t-mobile

I wonder if I could use in Brazil to 4g doing this procedure? Here frequency is 2600! and installation can ETRIEVE Portuguese Brazil?
[Verizon HTC One (M8)] rlbrooks:
Any Luck?
[Verizon HTC One (M8)] motumbo:
In my case I'm using this thread method to enable voice and data at same time for Movistar Colombia gsm network which is having lte at band 4 1700 mhz. By the way I used this 'converted' phone past week in Claro Puerto Rico network at 700 mhz lte band and in Haiti Digicel 3g only network with no issues.
[Verizon HTC One (M8)] rafucho:
I'm also using an HTC One M8 originally from Verizon in Colombia with the tigo carrier. I'm using android revolution HD 8.0, and have intermittent voice and data, I'm using the LTE on/off app that turns off the CDMA capability of the phone....

Sent via Tapatalk
[Verizon HTC One (M8)] hpham033:
Will this fix still work on the 4.4.3 update? I am considering rooting and s-offing my phone in order to convert my M8 to tmobile. Just want to make sure this all still works. Thanks.
[Verizon HTC One (M8)] rpalmerin:
Yup. It still works after update. I am using a vzw m8 on T-Mobile. But I'm running viper one 2.4. And loving it
[Verizon HTC One (M8)] mcforres:
HTC One M8 issues with ARHD 11.1 ROM install

Hey guys, this is my first post on XDA, and I'm in need of some assistance.

I have a HTC one M8 (originally on Verizon) that I'm now using on tMobile. I'm following the instructions in this thread for installing ARHD to my device:

I rooted the phone using WeakSauce and then SuperSU. I handled S-OFF via firewater, and I changed to SuperCID. I'm running TWRP 2.7.0.2 (also tried 2.7.0.0) and attempting to install ARHD 11.1 ROM. The flash completes successfully but shows:

"set_perm: some changes failed."

When the device reboots it gets stuck on the HTC one splash screen and never completely boots. I have to power off using power + volume up.

I validated the md5 checksum of the downloaded ROM and all is well.

What else can I check?
[Verizon HTC One (M8)] Vlad3389:
Same here!

Do we need to flash some specific kernel before trying that ROM, maybe?
[Verizon HTC One (M8)] andybones:
Did you flash the latest android 4.43 Verizon ota 2.21.605.2?
[Verizon HTC One (M8)] rafucho:
What version of ARHD are you on?
[Verizon HTC One (M8)] mcforres:
Team Venom

I ended up downloading the ViperOne M8_2.5.0 ROM and it's working well so far.
[Verizon HTC One (M8)] gigawatt:
vzw m8 on t-mobile with gpe rom and everything working right

Hi, two questions, is there a gpe rom that this works well with lte, voice, messages, or just htc based roms. And is there always going to be flipping on and off of cdma or is this a perminate fix once you flip it off, I'm totally blind and tried to read through all of the cludder the best I could, and thanks for the help
[Verizon HTC One (M8)] Vlad3389:
Got the 4G icon but...

Hi all,

I have a Verizon M8 on which I installed Viper 2.5.0 with the T-Mobile setting during installation.

The problem is I have the 4G icon lit in my area (I live in Belgium) but the speed is an HSPA+ one, not LTE (13Mbps). I also had a friend of mine with a SIM from my provider testing the speed at the same time with an iphone 5S and he was getting 27Mbps...

My question to you is: is there anything else I can do to have real LTE speed on my phone?

I honestly didn't have the courage to use QPST and mess with the bands: anybody tried that? Any experience?

Thanks a lot,

Antonio
[Verizon HTC One (M8)] blumpkinblake:
For your carrier, find out what radio bands they use. The Verizon m8 may not have the LTE bands that your carrier has
[Verizon HTC One (M8)] Vlad3389:
well theoretically it should : it's band 3 (1800 MHz)...

Should I go ahead trying QPST ?

Anybody tried that on the Verizon M8?

thanks,

Antonio
[Verizon HTC One (M8)] Talal916:
Does this still work?

Does this still work on the newest Verizon firmware? I can't get wifi working on the latest ARHD (21 or 2.1 I think), but I didn't try flashing Elemental. I can't find the most recent version of Elemental, and don't want to flash something from months ago if it won't work.
[Verizon HTC One (M8)] svil3:
You need this: http://android-edge.com/forum/viewtopic.php?f=266&t=8856&sid=bb7b86a54cc8a2ba59713d06de168b81
[Verizon HTC One (M8)] Talal916:
Thanks! Have you used this on VZW M8 with ARHD? Does the wifi work with this kernel?
[Verizon HTC One (M8)] mido.fayad:
Now the interesting Part which making me crazy

How can a lot of you flash arhd to your Verizon m8 ???? Although arhd script flashes the system to mmcblk0p45 !! And boot.img to mmcblk0p42 !!

While Verizon one m8 has system at mmcblk0p46 and boot at mmcblk0p43 !!!!

Can anyone upload the updater script from the arhd Rom which worked for him on Verizon m8

It seems very strange that it's working but Sprint has the same partition structure so it should work with Sprint only not verizon

Edit :

Even elemental kernel 0.4 linked in the the first post flashes the kernel to mmcblk0p42 which is reserve partition for Verizon devices not boot !!!
[Verizon HTC One (M8)] vprasad1:
Fenny's 4.4.2 T-Mobile 1.57 ROM Works! w. VZW firmware 1.55.605.2

Tried upgrading firmware to Verizon 3.28.605.4 and then to try installing a few 4.4.4 International ROMs and International kernels, but couldn't get them to work (black screen when I tried Andoid Revolution 22.1, others just wouldn't come out of HTC One screen).

Anybody gotten 4.4.4 ROMs running for T-Mobile network on the Verizon M8? I was in a time crunch, so didn't get a chance to be more systematic in testing.

I was unable to find this OP's ver 3.4 from the Android Revolutions page

Instead settled on doing a near RUU from the RUU M8_VZW files (s-off only) thread to get down to firmware 1.55.605.2.

Then I did a full wipe and Installed Fenny's

[ROM][TMO][ODEXED/DEODEXED][4.4.2][HTC 1.57 OTA] Stock+ 5/20/2014 and all seems to be working so far-- WiFi is working, voice works, MMS works, camera works.

Was curious to try the 5.0.1 GPE ROM which is supposed to be multi-carrier, anybody given it a shot?
[Verizon HTC One (M8)] gigawatt:
tried, and only got voice and 3g data, didn't flash the gsm varient, just picked verizon in aroma, didn't know if it was safe to pick gsm on a verizon so didn't do it!
[Verizon HTC One (M8)] 2ndLeaf:
I tried 5.0.1 GPE ROM and chose gsm varient. Everything works fine. I got 4G LTE speed.

The only thing I don't like (or don't know how to change) is the network indicator doesn't show the network type. I have to either use another app, or display phone info to get network type.
[Verizon HTC One (M8)] vprasad1:
What Verizon firmware are you running with the Lollipop? 3.28.605.4 or 2.21.605.2 or 1.55.605.2? And how stable are your connections?
[Verizon HTC One (M8)] 2ndLeaf:
It's 3.28.605.4. I only used it for 6 hours before I switched back to Verizon. I didn't experience any issue.
[Verizon HTC One (M8)] 2ndLeaf:
I also tried ViperOneM8 3.2.1 ROM with T-Mobile tweak. It didn't work initially. Initial setup never completed after installation. Then I changed CID to T-MOB010 and re-installed ViperOneM8 3.2.1 again. Everything seemed working fine. I could even make Wi-Fi call. I only played with it for half an hour so don't know how stable it is.
[Verizon HTC One (M8)] vprasad1:
So, wife and i did a road trip from northern to southern California with our Verizon phones now on T-Mobile. The HTC M8 signal was significantly worse than my a Samsung S4 driving down highway 5. I scratched my head and started digging after we arrived.

The Verizon site lists the following for their M8:

LTE Band 13, 4

CDMA/1xEVDO Rev. A (800/1900 MHz)

Global Network: EDGE/GSM (850/900/1800/1900), HSPA/UMTS (850/900/1900/2100)

T-Mobile uses:

LTE bands 2, 4, and now turning up 12

HSPA+ on AWS and 1900 MHz

GSM on 1900 MHz

So... We're only covered for LTE band 4 with no fall back to band 2, and no indoors access to band 12 so we're a bit limited for LTE.

We're on slooooooooow HSPA (14Mbps down, 5.8 Mbps up) but not HSPA+

Pretty limited signal options!

The Verizon S4:

The Verizon site lists the following for their S4

LTE Band 13,4

CDMA/1xEVDO Rev. A (800/1900 MHz);

Global - EDGE/GSM (850/900/1800/1900), HSPA/UMTS(850/900/1900/2100)

So in theory i should have had crappy reception on both devices, but the M8 reception was far worse.

I've read that the M8 CDMA phones have different radio hardware than the GSM variants... So no amount of software tweaking or ROMing or flagging T-Mobile radios on the Verizon M8 or updating to the latest Verizon radios will improve connectivity on T-Mobile-- is this true?

Does the Verizon S4 have different radio hardware than the other GSM variants? Is this why my reception was better on the S4 than the M8?

Thinking that the M8 will probably have to be flashed back to Stock Verizon for sale on Swappa after a dedicated T-Mobile phone is found.
[Verizon HTC One (M8)] seakha:
your final verdict?

Thank you for very informative post and all the details. I am also owing HTC one M8 from Verizon. I move to T-Mobile in September. I am using my phone with the HSPA and not that great data speed so far. As your final verdict, do you think it worth the hassle to go through all the process (s-off; update firmware; flash a new ROM) to get the phone working with 4G LTE? What was the most functional and stable ROM you have tested?

I very much appreciate it if you can share the information.
[Verizon HTC One (M8)] vprasad1:
I don't remember if the stock ROM lets you adjust the APNs or if it requires a custom ROM to get to Settings / Mobile Data / Access Point Names. If so, then add the one provided here for fast.T-Mobile.com

The value of S-Off / ROM in this situation is subjective. If you're in a major metro area and you need the speed, then maybe it's worth it. If you're somewhere with limited coverage then perhaps not. I had purchased my phone already S-Off, so it wasn't an extra expense for me.

In my situation, having found the limitations of using the Verizon phone on T-Mobile, I think I'm better off getting a T-Mobile phone and selling my Verizon phone on Swappa. For me it's not worth the effort to keep backing up settings, installing a T-Mobile ROM, checking if it works with particular radios, and then restoring my backup of the test fails, etc.

My most stable configuration was the T-Mobile Fenny ROM with the Verizon 1.55.605.2 firmware.
[Verizon HTC One (M8)] vprasad1:
Anybody tried this stuff to add additional LTE and GSM bands for T-Mobile on their VZW M8 phones?
[Verizon HTC One (M8)] seakha:
Thank you vprasad1! I could adjust the APNs with the stock ROM and I am living in a metro area that the LTE speed is a real game changer. Verizon software does not allow me to use GSM with LTE at the same time and I have no control over in Mobile data setting of the phone.

My phone still has the Verizon 1.55.605.2 firmware, so I might try the Fenny ROM to see how it works. BTW, please update us if you are successful adding new bands and radio's through the recent link you posted.
[Verizon HTC One (M8)] seakha:
Did you have cellular connection to 4G LTE or HSPA on t-mobile? I tried ViperOneM8 3.2.1 with T-Mobile tweak. I have wifi call and that works but it does not have cellular connection (no data, no calls without wifi). I changed the CID to Super CID and T-MOB010. It did not work. I was wondering whether you had cellular connection on t-mobile?
[Verizon HTC One (M8)] knightofarmenia:
I followed this guide to the letter, including flashing the new kernel, but I still cannot get WiFi. I have everything else - LTE, cell phone reception, MMS, SMS, internet, everything. But I need to be able to turn wifi on! I've read about "having to update the firmware," but this is the first thing I've ever rooted, and while I'm super excited I haven't bricked it, I'm horrified that I'll ruin it if I don't do the firmware updates right. Can someone please help me out here?
[Verizon HTC One (M8)] 2ndLeaf:
I had 4G LTE cellular connection on T-Mobile.
[Verizon HTC One (M8)] seakha:
You need latest firmware

You should have the latest firmware for 4.4.4. You can get that from this post : EXE/ZIP RUU M8_VZW 4.4.4 (s-off only)(newest). Thanks to [MENTION=3472611]dottat[/MENTION]

I had some difficulties to convert the phone in the past few days but finally I have a working converted Verizon M8 on T-Mobile since last night. I am testing it for another day to see how stable it is. If everything works fine, then I will write a post here to explain the steps with the links.
[Verizon HTC One (M8)] leesamuel128:
My phone when I try this gets a black screen on bootup. I am super-cid and s-off.
[Verizon HTC One (M8)] Vlad3389:
Hi, have you done a speed test in 4G after ask of this?

I did more or less the same ( happily using viper since months) but never got 4G speed anywhere, even though the icon in the status bar says so...

Thanks