[Mogul, XV6800 ROM Development] chibifs:
This used to be a post about things that were broken, I have solved the majority of them. Keep these tips in mind when upgrading. :

Phone Programming

Make absolutely sure you backup your MSID from ##778# before performing any Radio flashes.

Your MSID should not be the same as your MDN on a Sprint device.

Sprint prints your ESN and MDN on their reciepts.

Your MDN is your Phone Number. (It took me a while to figure this one out.)

If you lose your MDN, your voicemail will still work, just call your phone from your phone. The MDN entry is at a different location than ##778# and does

not require an unlock code to edit. A Sprint rep gave me the number, but I forgot it.. It was something along the lines of ##0264788#? If someone knows it, feel free to post it and I'll try to edit it in.

Backup Issues

E-MAIL BACKUPS from WM6.0 will disable your TEXT MESSAGING if you restore them on to WM6.1; Keep your emails backed up via some other method.

SOFTWARE

S2U2 May be problematic with WM6.1, All tests so far have led to a black screen. It is supposedly repairable by using DirectDraw, Another alternative is to use the locker in PointUI.

TouchFlo is not an incredible advancement in the way we use PDAs, it is a problematic finger gesture system. You're better off binding some sort of launcher to your now unused voice calling key. There are also shell extensions which allow you to add secondary actions for holding down a hard key.

Avoid using:

HTC Audio Booster - Doesn't Work

HTC Equalizer - Doesn't Work

(SRS WoW does seem to work.)

HTC Plus - Doesn't Uninstall if you hate it, HTC Home is better.

HTC Quick Launcher - Functionality included in HTC Home

HTC Audio Manager Today - Function in HTC Home

If you have a spare buck, or a keen sense of evading the law, SPB's application suite is a pretty dandy thing to have. I'm an avid promoter of open source software, but Diary, Home, and Plus offer a lot of extra usability.

PointUI is freaking sweet, no question, but the application navigation and task management aren't very user friendly. Hopefully the PointUI team continues adding to their great app. There seem to be some random half-crashes of the app when using the replacement taskbar.

Some SPB Extensions are causing lockups. Could not pin it down, but it was something in Plus! or Phone Suite

BATTERY LIFE

AGILE MESSENGER uses 33% of your processor at ALL TIMES on WM 6.1, If you are having battery issues, try switching to something a little more lightweight. Fring is a pretty lightweight app, and it supports Skype and GoogleTalk voice calling, too. This alone should save you having to purchase an extended battery.

Enabling your GPS Chipset doubles your Idle power consumption.

There are several Extended Battery models you can use with your Titan, two of them which portrude from the enclosure. In general messaging and internet use I find that the regular battery is down to about 40% in my day, about two hours of which I can actively use the device, not including talk time or music listening. I usually take about 10 non-flash panoramas or photos a day from boredom.

The extended battery with the rounded portrusion makes holding the device more comfortable, however, in landscape mode, I often feel myself rubbing over the camera lense for better grip. It also makes it impossible to fit in the included holster, and incompatible with any protective shells, My battery life with Agile Messenger running (which remember eats more battery power than GPS) was at about 50% on the end of each day, and I used the device for about a 50 minute extra period due to bus travel and bus stop boredom.

The largest extended battery will probably allow even the most bored of employees keep entertained, but this battery's casing nearly doubles the size of the phone, costs as much as the phone with a service agreement, and it's rough edges look like they would make the phone the most uncomfortable device to use for anything. Try not to grab this one up for only a 400mah boost, with too much extra portrusion to keep it in the same pocket as your wallet.