Originally Posted by GMMan
1x is CDMA talk for 2G speed. I'm willing to bet that they are working on equipment or you've wandered onto a weaker signal, just as GMMan said.
Try dialing *228 (and press send) to update your PRL (preferred roaming list).
Or for a more advanced maneuver use this hash code:
##EVDO# (3836) (CMDA only)
This opens a "EVDO Mode" page that controls your phone's EVDO Settings. It gives you the options to force your pre into the following options: 1xRTT only, EVDO Rev 0 only, Hybrid Rev 0, EVDO only, or Hybrid Rev A (meaning pick the best available). Hybrid Rev A is likely to get you the best speed, but if you don't have good reception in your area, you may want to choose something else to conserve battery life.
More hash codes can be found at Internals: WebOS Hash Codes - WebOS Internals