I would try calling *228 and selecting option 2 to update your PRL. This can take up to two minutes to perform. When done, go into your Options to Mobile Network. Set Network Technology to 1XEV. I think it is set to Global by default. Anyways, usually just updating your PRL will do the trick. You can do this about once a month, as the towers are usually updated with new information about every month. When done, pull the battery and allow the device to reset. Hope this helps.