Here's the info I found for the epic touch
GUIDEGetting your SPC\MSL1. If you have root the MSL reader app (in market) should work (I would assume).
2. Get it from Sprint: this is very easy to do I just opened an Echat and said my phone didn't program itself automatically and the process the rep walked me through involved giving me the MSL.
3. Terminal Method-Install Connectbot-Open Connectbot-change ssh to local-type a nickname and hit enter/done-type "getprop ril.MSL" without the quotes, this is case sensitive so some keyboards that screw with capitalization may not allow you to enter this exactly.The number you see is your MSL.Updating the PRLOnce you know your MSL, you need to download and install the program QPST 2.7 Build 323, it might be possible to use another version of the program but this guide was made using version 2.7 b323. QPST is not a paid program but is intended for developers, providers and maintenance technicians, according x-drivers.com the software is “freeware”.1. google, download and install QPST 2.7 Build 323.2. download the Kies setup program above and install it, included are the drivers you will need.*2.5 Make sure your Epic is not USB debugging mode, to disable, go to settings>applications>development>uncheck USB debugging3. On your Epic, with the touchscreen dialer, dial ##8778#
4. Change the setting from AP to CP, then hit Home.
5. Connect your phone to your computer with the usb cable.
6. Your computer will automatically install the modem drivers for your Epic wait until you see the “device is ready for use”
7. Open QPST Configurations. Start>All Programs> QPST> QPST Configuration.
8. Click on the “Ports” tab and “Add a new port”
9. Select the “COMXX – USB\QC Diagnostic” and click ok, in my case the port number was 10, your port number will be different, if you see more than one, disconnect all your external devices such as external HDDs, phones, Bluetooth dongles, ect. If you don’t see a port. Disconnect your phone, restart your computer, connect your phone and try again, you might want to remember your Epic’s port number for future use. If you still don't see a port uncheck the box for "Show Serial and USB/QC Diagnostic ports only" and add all of the USB/Unknown ports. One of them should show an active phone.
10. Click “Start Clients” on the top of the program and open Service programming.
11. On the new Phone Selection windows you should see one active phone select it and click ok.
12. Click “Read from the phone” and enter your 6-digit MSL code
13. Click on the “Roam” tab and click the “Browse…” button, here you will need to browse for the PRL file select it and open it.
14. Click “Write to Phone”
15. Your Epic Touch will reboot and you can close all the programs now. On your phone go to settings>about phone>status> and make sure the PRL version matches the PRL number you downloaded, if yes, Congratulations you all done!!16. Don’t forget to change back the USB settings to AP on the ##8778# menu