Samsung u340 Tutorial
This is for the Verizon u340. NOT the Alltel u340. If you use this guide on a Alltel u340 you will lose use of your ear piece.
Isriam Edit* If you have problems use the com port # of the USB Modem in your hardware modem. Once you click Connect in CDMA Workshop, click QCDM to let it connect to the phone.
To write the ESN back to the phone, use UNICDMA.
Credit: Amoamare