[AT&T HTC One (M8)] RodrigoMM:
OTA update problem

Thanks redpoint73. As I had the same problem regarding the OTA update, I've tried to do exactly what you and the HTC dev team said, but I got the error 155 (as I was using the wrong ruu). At this point HTC dev cannot help me any longer, so I was wondering if you can. Here's the history of my communication with them:

Bautista (North America Support (HTCDev.com Others))	Please allow me to introduce myself, my name is Luis and I'm with the HTC Special Projects Tier 3 department. I am reaching out to you currently in regards to SPT3 Case S2016001453301 . This case was a result of a ticket you recently had escalated to our department regarding the development trouble you were experiencing on your HTC Device. I would be more than happy to assist you with this. Before we begin, I will need to capture the following information from you in order to be able to provide the most efficient and effective support. *First 6 lines of text on the HBoot screen *Developer and software version of any 3rd party OS flashed to the device *Developer and software version of any 3rd party recovery flashed to the device *Output of 'fastboot getvar all' *Any error messages you have received Once I have the data specified above, I will be able to begin working on a resolution for your issue. Please click the second link below to reply. Until then, best wishes.	2016/03/30 00:39:16

Rodrigo Moreira	Dear Luis, thanks for your reply. Well, the HBoot Screen shows: *** Software status: Modified *** *** UNLOCKED *** M8_UL_CA PVT SHIP S-ON HBOOT-3.19.00000 RADIO-1.24.21331147A1.09G OpenDVP-v48.2.2-0564-M8974_FO.1211 OS-4.16.1540.8 eMMC-boot 2048MB Jan 6 2015,00:38:22.0 I bought this phone with the TWRP installed. But apparently this software was preventing the device to be updated. I don't know the version of TWRP but I tried to remove it following, but It didn't work (At that time I probably didn't use the correct RUU). Now when I try to get the system update, as soon as the download is complete and the device restarts, it shows an error screen (attached). Then I have to restart the phone in order to use it normally. Well, that's it, I just want to unroot my device. If you need any other inormation, please let me know.	2016/03/30 01:10:34	IMAG0394-672x372.jpg

Bautista (North America Support (HTCDev.com Others))	Hello Rodrigo. Thank you very much for replying with that information. Now I'll be happy to walk you through getting the 'fastboot getvar all' information. To make this much easier, please create a new folder on your desktop and name it 'Android'. All files that we download from here on out, will need to go into this folder. Please navigate your browser to htcdev.com. If you do not have a log in, you will need to create one. After logging in, click on 'Unlock Bootloader' and then select the 'Get Started' Button. Select 'All other supported models' in the drop down menu. Click 'Begin Unlock Bootloader'. Read the warranty implication pop ups and if you agree, go ahead and click through them. Now you should see 'Unlock bootloader instructions'. This is the ONLY page we will need right now. At the bottom of the page, you will see fastboot files. Please select the one that matches your computer operating system (First one for Linux, second for MAC, third for Windows). Please ensure that these files are downloaded into the Android folder. You may already have the ADB files, so for now, we will stop downloading here. Minimize the browser window (don't close it), and open the Android folder you created. Take CTRL + Shift + Right Click (on your mouse) and select 'Open CMD Prompt Here'. Now on your phone, completely power the device off, Press and hold the volume down key. Without releasing the volume down key, tap the power button for 2 seconds. Your screen should light up with 3 Android characters. Release the volume down key. Use the volume keys to highlight 'Fastboot'. Once highlighted, tap the power button one time to select it. Your screen will now change. Connect the phone to your computer with the cable provided. Your phone's screen should now read 'fastboot usb'. If your phone does not read 'fastboot usb', stop here and let me know. If it does read properly, type the command 'fastboot devices' into your CMD prompt. You should see a serial number show on the screen. If it does not show, stop here and let me know. If it does show, next type 'fastboot getvar all'. I'll be waiting your reply. Thank you very much for your time. Have a wonderful day. Bye	2016/03/30 02:58:06

Rodrigo Moreira	Hi Luis, when I typed 'fastboot devices' into the CMD prompt, an error message appeared (see attachment). What should I do now? Thanks	2016/03/30 06:41:13	Error.jpg

Bautista (North America Support (HTCDev.com Others))	Hello Rodrigo Thank you for replying, Let’s try the following: Download the HTC sync manager program from this link This will include the adb file you need. It is normally located in C: Program files>HTC>HTC Sync Manager>HTC sync Copy the AdbWinApi.dll file into the Android folder and try running the command once again. Let me know the results. Thank you very much for your time Sir. Have a wonderful day. Bye	2016/03/30 21:34:14

Rodrigo Moreira	Hi Luis, now I got it. The number is: FA491WM02345. What's next? Tks	2016/03/30 23:09:10

Bautista (North America Support (HTCDev.com Others))	Hello Rodrigo. Thank you very much for replying. That's the serial number of the device. Next step will be to run the command fastboot getvar all. That result is the one that we are needing at this point. Double check the instructions and you will see Sir. Let me know if you want me to send you the instructions in Spanish. I'll be waiting your reply. Have a wonderful day and thank you very much for your time. Bye	2016/03/31 21:04:42

Rodrigo Moreira	Good morning Luis. I'm sorry, I forgot to check the instructions. The results of the "fastboot getvar all" command were: C:\Users\Rodrigo\Desktop\Android>fastboot getvar all (bootloader) version: 0.5 (bootloader) version-bootloader: 3.19.0.0000 (bootloader) version-baseband: 1.24.21331147A1.09G (bootloader) version-cpld: None (bootloader) version-microp: None (bootloader) version-main: 4.16.1540.8 (bootloader) version-misc: PVT SHIP S-ON (bootloader) serialno: FA**********5 (bootloader) imei: 3*************1 (bootloader) imei2: Not Support (bootloader) meid: 00000000000000 (bootloader) product: m8_ul_ca (bootloader) platform: hTCBmsm8974 (bootloader) modelid: 0P6B12000 (bootloader) cidnum: BS_US001 (bootloader) battery-status: good (bootloader) battery-voltage: 0mV (bootloader) partition-layout: Generic (bootloader) security: on (bootloader) build-mode: SHIP (bootloader) boot-mode: FASTBOOT (bootloader) commitno-bootloader: 3aa067db (bootloader) hbootpreupdate: 11 (bootloader) gencheckpt: 0 all: Done! finished. total time: 0.082s Tks, Rodrigo	2016/03/31 23:09:52

Bautista (North America Support (HTCDev.com Others))	Hello Rodrigo. Thank you very much for replying. Wonderful! I am going to review this information and formulate an action plan for you. Thank you very much for your time Sir. Wait for my next interaction. Have a nice day. Bye	2016/04/01 02:45:27

Rodrigo Moreira	Hi Luis. I hope you didn't forget about my issue... Tks	2016/04/09 22:08:20

Bautista (North America Support (HTCDev.com Others))	Hello, Rodrigo! I hope you are going awesome! I am working on your case, please, allow me a couple of days. I will contact you back as soon as I have the complete information. Have an awesome day! Luis SPT3	2016/04/09 23:15:40

Rodrigo Moreira	Hello Luis. Anything yet? Have a nice weekend.	2016/05/07 06:56:39

Bautista (North America Support (HTCDev.com Others))	Hello Rodrigo. Sorry for all the delay to get back to you Sir. I want you to try to install the RUU for your phone from. You should get the unlocked version for your phone (HTC one m8). with number 6.12.1540.4. First put your device in fastboot mode Remember to completely power the device off, Press and hold the volume down key. Without releasing the volume down key, tap the power button for 2 seconds. Your screen should light up with 3 Android characters. Release the volume down key. Use the volume keys to highlight 'Fastboot'. Once highlighted, tap the power button one time to select it. Your screen will now change to fastboot USB. Connect the phone to your computer with the cable provided. Your phone's screen should now read 'fastboot usb'. Now to put ready the device to take the RUU and start installation you can open a command window in the file that we created and type the following command fastboot oem rebootRUU. Then run the RUU. Please try it and let me know the results. I'll be waiting your reply. Have an amazing sunday and again sorry for all the delay Sir. Bye	2016/05/09 01:34:22

Rodrigo Moreira	Hi Luis. Find attached the error message I got when I was trying to update the system. Thanks	2016/05/09 02:47:15	Error155.jpg

Bautista (North America Support (HTCDev.com Others))	Hello Rodrigo. Thank you very much for replying. I would like to mention that HTC does not support modified software on the phones. And at this point TWRP is not allowing to install the official RUU. Our dev scope will not allow us to walk you through the process. In a typical scenario, you get your phone back into safe conditions (in that case you must install the Android recovery tool once again). Then we go ahead with the process, it is for security reasons and not bricking your phone. All the process must be done from customer’s side. Having said that, I'll be happy to take a look at what's going on and at least point you in the right direction. Currently, you will need to explore third party development support web sites to find a more direct answer to your question. I would recommend starting your research at the following web sites: • XDA-Developers.com • AndroidCentral.com • Developer.android.com I know this limitation in the assistance may cause some delays in the completion of the resolution you desire, and for that we apologize. However I want you to try the following. Put your device in fastboot mode and showing fastboot USB. Then open a command window on the same file that we created previously and type the following command: fastboot oem lock . That will relock the bootloader. Then try to install the RUU again. Please let me know the results. I'll be expecting your next interaction. Thank you very much for your time and for being part of the HTC family. Have a wonderful day Sir. Bye	2016/05/09 22:24:04

Do you think you can help me?

Thanks in advance.