[Sprint HTC EVO 4G LTE] Socrguru:
I don't take any credit for finding this fix, but I wanted to make it more accessible for E4GLTE owners.

Want to be able to access your Exchange email account without the security permissions required by your work/school? I know I do - so here's how:

First, backup your ROM (this is a fairly safe modification, but better safe than sorry).

Next, remove your Exchange ActiveSync account if you already have it on the phone (I've had good luck skipping this step). Then follow these steps (or just use one of the recovery flashable zips):

Download the attached Mail.apk to your phone.

Using a root access file explorer (Root Explorer is my favorite) go to \system\app

Mount as R/W, and delete or rename Mail.apk and mail.odex (I renamed them to Mail.apk.bak and mail.odex.bak).

Copy the downloaded Mail.apk into \system\app

Set permissions to match the original Mail.apk

Reboot (Recommended: reboot to recovery and clear Cache/Dalvik cache)

Now re-add your Exchange account, and you should be set!

Note that this makes your sensitive email more vulnerable to bad people if your phone is stolen (and your security admin will not be happy with you if they find out) - this is on your head, not mine!

Huge thanks to rathore4u for making the original modified app available for a large number of phones (ICS both Sense and AOSP). Original thread is here - be sure to thank him for his wisdom!

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*Edit 2/15/2013* - Rebuilt from the newest OTA build (3.16) (works now - thanks mikeyxda!)

*Edit 2/13/2013* - Added revert-to-stock zip for 3.16.

*Edit 12/27/2012* - Rebuilt the modded apk from stock Evo LTE JB (no longer using shnizlon's)... hopefully this will fix any problems people were having? Also added a revert-to-stock JB zip.

*Edit 12/18/2012* - Added a flashable zip for Jelly Bean/Sense 4+. Credit goes to tbonnano231 and shnizlon - go send them some Thanks!

*Edit 9/4/2012* - Fixed my flashable zips to work better (correct permissions and automagically clears cache/dalvik cache).

*Edit 8/31/2012* - Used Rathore4u's guide to modify the Sense 4.1 Mail.apk (from the 2.13.651.1 base).

*Edit 6/29/2012* - Using rathore4u's how-to guide and the Mail.apk from mikeyxda's MeanROM, I created a Mail.apk with Sync While Roaming and HTML message format available. I've attached this as an apk and a flashable zip (make sure to rename the apk to Mail.apk if you go the manual method). Be sure to thank both rathore4u and mikeyxda for their contributions!

*Edit 6/14/2012* - Rathore4u stepped up and helped us out - we now have our very own modified mail app for the E4GLTE! This version has none of the bugs the previous one had (text prediction/deletion works just fine [tested using SwiftKey] and notification sound works as well). I've replaced the attached file with the fixed version, and included a flashable zip I made for those who are lazy like me :)

Attached Files (newest files are blue):

Mail-41.apk - Stock Evo 4G LTE mail with security disabled (2.13.651.1 base - NEWEST)

Mail-sans-security_E4GLTE-41.zip - Stock Evo 4G LTE mail with security disabled, recovery flashable zip (2.13.651.1 base - NEWEST)

Mail.apk - Stock Evo 4G LTE mail with security disabled (from older base)

Mail-sans-security_E4GLTE.zip - Stock Evo 4G LTE mail with security disabled, recovery flashable zip

Mail-MeanFeatures-NoSecurity.apk - MeanROM mail (Sync while roaming and HTML enabled) with security disabled [rename to Mail.apk when you install]

Mail-MeanFeatures-NoSecurity-E4GLTE.zip - MeanROM mail with security disabled, recovery flashable zip [this zip backs up your previous Mail.apk as Mail.apk.bak, in case you want to go back to stock]

Mail-No-Security_EvoLTE-JB.zip - Jelly Bean/Sense 4+ mail with security disabled, recovery flashable zip

Stock-Mail_EvoLTE-JB.zip - STOCK Jelly Bean/Sense 4+ mail, recovery flashable zip (revert to stock!)

[*]Stock-Mail_3.16.zip - Stock Jelly Bean/Sense 4+ mail 3.16 OTA, recovery flashable zip

[*]Mail-No-Security_3.16.zip - Jelly Bean/Sense 4+ mail with security disabled for 3.16 OTA, recovery flashable zip