Just reveived a replacement Mogul 6800 from sprint. Some differences, including the inability to force roaming to "Roam Only." Below are the directions to fix this and get the "Roam Only" option into your settings.
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For Sprint Mogul 6800
To get a "Roam Only" option on your Mogul 6800, do the following in a RegEdit Program.
Get A Reg Edit Program Here:
http://www.phm.lu/Products/PocketPC/RegEdit/
Step 1) Start your RegEdit Program and navigate to the following string:
HKEY_LOCAL_MACHINE\SOFTWARE\OEM\InitProv\PhoneSett ing
Step 2) Change ItemCount to 3 (was 2)
Step 3) Edit (lower left side of screen)
New string: ItemName3
Value= Roaming (you will add the word Roaming)
Step 4) Edit (lower left side of screen)
New Dword: ItemValue3
Value= 3 (you will add the value of 3)