Source of the tutorial: http://mirror.softcox.com/e398-to-ROKR/
You MUST backup EVERYTHING ON YOUR PHONE FIRST. DO NOT SKIP THIS STEP FOR ANY REASON. To get started, turn your phone off and take your TransFlash card out if you have one. You have to remove the battery and take it out the same way you would remove your SIM card. You can leave your SIM card in if you wish, it makes no difference.
Backing up images/ringtones/video:
Turn your phone on, and make sure under "USB settings" that "data/fax connection" is selected NOT "memory card". The location of USB settings varies depends on firmware, it may be under settings or under the connections menu.
If you don't have a USB settings menu just ignore that step, the phone should default to data/fax
Run P2KTools, and plug your phone in.
Make sure the large button on the top left is set to P2K mode NOT AT mode.
Windows should detect the phone in normal (AT mode) then switch it to P2K mode automatically for you. This might take 30 seconds or so to do.
Once this has been done you can "connected"
Hit the refresh button to gain a list of files.
Browse to /c/mobile
Inside the folder here you will find any saved pictures/audio, selected the ones you want to save and hit the Download button
Backing up your websessions fileYou will want to make a backup of this if you have setup WAP/GPRS from your provider, otherwise you will need to contact them to retrieve your settings.
Using the method above, browse to /a/ and find the file Websession (no extensions)
Download it somewhere you wont forget
Backing up your contactsIf you have any contacts stored on your phone, you will want to back these up first. Any stored on your SIM card will be untouched by the flashing procedure. Note that P2KTools sometimes gets confused when you have multiple entries with the same name (but different number types). If you want to be 100% sure you wont lose your phonebook make a hard copy of the numbers on paper.
Disconnect your phone if plugged in
Open P2KTools and switch to AT mode
Wait until you see "connected" in the bottom left
Switch to PhoneBook and hit Read
Hit Backup and save the .csv somewhere
Backing up your SMS Messages
Using the same method as above, open P2KTools in AT Mode
Hit the SMS button and select the message you want to save
Save the .txt file somewhere
Backing up your current phone firmware
THIS STEP IS VITAL, DO NOT SKIP IT.AT THIS POINT ENSURE YOUR BATTERY IS FULLY CHARGED, OR YOU MAY BE STUCK IN BOOTLOADER MODE WITH NO WAY TO RECHARGE THE BATTERY!
Disconnect your phone from your computer if it's plugged in
Ensure your phone is set to Data/Fax under USB settings if you have this option
Run FlashBackup
In the setup tab, choose a folder to store your backups in
Go to the Backups tab, choose Full Backup and 32MB
Plug your phone into USB port and wait until you see Connected on the bottom left
Press create, and wait for the process to complete, which may take 10-30 minutes.
If you get asked for drivers at any stage here, tell Windows to search for drivers in the directory you have installed Motorola PST to.
At this point the screen on your phone may have garbled text or lines down it. Don't worry, this is normal and will fix itself when you restart the phone.
Wait until FlashBackup has done it's magic and compressed the backup
Browse to the folder you selected earlier
Find the .fbp that was created. Also there may be a .dsc file
Copy these files somewhere as a backup, along with anything else you have already backed up (phone book, pictures etc), maybe burn them to a CD, upload them to the web or store them on a USB flash drive. Just don't lose them!
Now, repeat the process as above but choose PDS Backup
Again, repeat the process but choose Bootloader Backup.