[Mogul, XV6800 ROM Development] RyanMogul:
Here is a fix for GPS for all you VX6800 users that gps will not function!!

Yea I recently bought a xv6800 verizon mogul off of Ebay and when I got it I unlocked the bootloader, loaded my Custom ROM, and flashed a gps radio. The ROM worked great as expected except I couldnt get the Banner name Cricket to stick for the life of me, no matter what I edited using QPST. I also frowned when I used GPS viewer and the GPS seemed broke, it was not scrolling a thing! I was like great, go figure.

The answer has to do with the ERI, verizon mogul's need a specific ERI for the GPS chip to work properly.

How to fix a XV6800 Mogul's GPS after a ROM upgrade..

You are going to be flashing so dont forget to Backup your Contacts, Messages, and so forth using a utility like PIM backup!!

1: Make sure you have a formatted FAT32 Micro SD card 2GB and under with a GPS radio of your choosing named TITAIMG.nbh on the ROOT of the card with nothing else, its also a good idea to make a backup of your current functioning QPST settings so you can review them later the stock verizon ROM will touch some of those.

2: Download the following files from my HTC to Windows Unlock Tools directory. Download the VerizonStockROMandRUU.zip, Titan_Relocker.exe, a GPS radio of your choosing, and the titan_spl_olipro240.exe.

3. Connect the Phone to Computer via Active Sync and make sure its working properly. Now run the Titan_Relocker.exe, and make sure you follow the Re-lockers instructions just like you would an unlocker. Pay Attention and dont interrupt it!! When its done you can close the utility and command prompt windows that are open and leave the phone plugged in and still at the BootLoader screen.

4: Now run the Stock Verizon RUU, the file to run is Romupdateutility.exe and make sure to follow its instructions and let it finish without interrupting the process! When its done and it Boots UP give it a little to pass the first bootscreen then unplug the phone.

5: Let the Verizon ROM totally install and RUN CUSTOMIZATIONS, let it reboot and everything. Now dont mess with the ROM just Connect to your Computer again and Make sure its connected to active sync and functioning.

6: Now run the Olipro 2.40 unlocked Bootloader and follow its instructions until it comes up saying you must unplug and plug the phone back in. PLEASE dont miss that, DO NOT hit a key to continue UNTIL you have UNPLUGGED the phone waited a moment, then plugged it back in. Then you can hit a key and continue but PAUSE again and minimize that window. Now right click the Active sync icon on your PC's taskbar. Pick connection settings and then look for the Box with Allow USB connections. Clear the box (disable) the usb connections. Then click OK. Now open the window back up and click to continue. That will exit the Bootloader and reset the phone. Now right away UNPLUG the phone and Manually place it in Bootloader Manually. Now PLUG the phone back into the PC.

7: Now install the Custom ROM or whatever GPS (or NON GPS if you are going that route) enabled ROM you are going to use.

a. You can use an RUU utility to flash the custom ROM while its still plugged in and in bootloader.

b. You can flash the custom ROM with a Micro SD card, just unplug the phone and put the card in and manually put the phone in bootloader again using power + camera + reset all at the same time for a second or two.

8: When the ROM is done installing you MUST flash a GPS radio version 3.35 and up if you are using a GPS ROM. If you use RUU method you have to perform a hard reset after flashing the radio. If you use the Micro SD method you do not have to Hard Reset.

Still it is a good idea to hard reset and then pull battery for a minute to make sure the page pool is set.

Now you have to change most options all over again using QPST, like the banner and Nam NAMES and some authentication settings. Go over them with a fine tooth comb and when you are all finished double check them and go to the GPSone tab last. Uncheck all the boxes on the left in gps one tab and then re-select them then confirm your IP and Port plus pde settings are correct then write to phone, then close DMrouter, give it like 30 seconds or so then soft reset. When it boots up you can use PST/EPST to verify the settings stuck or to make more changes load a PRL etc.. Just make sure you set the Gps One settings according to the Carrier you are using consult with this thread http://forum.ppcgeeks.com/showthread.php?p=402134.. Also check your registry to make sure the ROM has that info set right. hkeylocalmachine/software/htc/supl_agps is the location. Check phone settings to make sure Location is ON, instead of 911 only.

Now your GPS should function perfectly using a XV6800 Mogul on any GPS enabled ROM!! The banner name will also stick! Enjoy.