Lock EVDO?

[gbm85]

You need your MSL. Dial ##PST#. Click on Edit, enter your MSL and press OK. In the upper-left corner, click on Display and select Modem Settings. Select Preferred Mode and select Edit. Choose HDR only from the drop-down list, select OK, and press the OK hardware key.

As stated, this will prevent phone calls from coming in. I've also had this not work. I tried this when I was in Florida in an EV-DO area and my phone kept saying 1X. After doing this, it would be Ev after a soft reset but it would still move down to 1X randomly.

To undo this, you not only need to change Preferred Mode back to Automatic, but also set HDR Hybrid Preferred to Enable.