If you really want to force 1x....then check:
Phone/menu/option/service/scroll down to see if you have the "Mode of Operation" if you dont....then you need to do the hack.
Edit at own Risk!!!!
HKLM\SOFTWARE\OEM\PhoneSetting
Change the option HiddenPreferenceMode from 1 to 0
Then go to Phone/menu/option/service/and check in the list, "Mode of Operation" should be at the bottom. You have 3 choices, Hybrid, EVDO, and 1X.
Once you have checked the box and hit ok, you will need to reboot, and then the phone should switch to 1x only.
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