[Count_Chockula]

Ok here are the settings that I just got from the Sprint Service tech. We had to manually enter all of these...

Go to the Dialer and enter ##3282#
Then select edit and type in your MSL
The settings below should get you back on line...

Active Profile: 1
MIP_Mode: Mobile IP Only
User Name: (should be your user name assigned from Sprint)
SPI MN-HA: 4d2
SPI MN-AAA: 4d2
Reverse Tunnel Preferrence: Enable
Home Agent IP Address: 0.0.0.0
Primary Home Agent: 0.0.0.0
Second Home Afent: 0.0.0.0
HA Shared Secret(Hex): secret
AAA Shared Secret(Hex): (should be your password assigned from Sprint)
After getting these setting in hit "ok" and let the phone reset.

If they don't more is required...
Go back to the dialer and type ##778# and enter your MSL again

then select M.IP Settings and enter the following:
Number Of Profiles:________1
Active User Profile Index:___1
MIP_MODE:_______________Mobile IP Only
MIP Registration Retries:____1
MIP Registration Retry Timeout:______2000 ms
Mobile Node-HA Authentication:______Disable
Send a Registration request Only in Use:_______Enable
Dromant Handoff Optimization:_______Disable

In M.IP Default:
Primary HA Address:___________68.28.15.12
Secondary HA Address:________68.28.15.12

Next select M.IP Customer Profile1 and enter:
Enable Profile:_____Enable
NAI:_____ (will be the sprint user name (name)@sprintpcs.com)
MN HA SPI Set:____Enable
MN HA SPI Value(hex):______4D2
MN AAA SPI Set:___________Enable
MN AAA SPI Value(hex):_____4D2
Reverse Tunneling Prefered:__Enable
Home Address:_____________0.0.0.0
Primary HA Address:_________0.0.0.0
Secondary HA Address:______0.0.0.0
HA Shared Secret:__________secret
AAA Shared Secret :________(will be the sprint generated password... will have to call them for this)
DMU public key(PKOID):_____0
MN Authenticator(hex):_____0

Hope that this helps you!!! If it doesn't then I would call their service center and ask to speak with a Lv3 tech. and they will help.
GL!!!!