Call customer service from another phone but have the cell phone with you. Ask if the IRDB (Roaming Data Base) is current. Also inquire about coverage based on either city or zip code for areas you use your phone. If all else fails, you might need additional technical or possibly warranty assistance.
I have had a Motorola V400 for about a year. Since I switched to this phone, I have had a ton of dropped calls. Anytime I get into a sketchy reception area and the phone drops to 3 or less bars, bye-bye call. It has only gotten worse over time and it seems like any call over 10 min will be dropped at least 1x. At my house I generally get perfect reception, but at times the phone will randomly drop to one bar and drop my call.
Is it Cingular or Motorola? I have two other friends who have this phone and have the exact same problem (both on Cingular). My roommate has a Nokia (Cingular) and does have some dropped calls occasionally but nothing too major. Cingular blames Motorola and Motorola blames Cingular.
To add to the confusion, now my phone is cutting off to a white screen just randomly (like when I open it, or am trying to open a game).
I am looking to upgrade; I can't decide whether I want to try again w/the Motorola Razr or go with the Sony-Ericsson S710a. Any suggestions? I prefer a phone with a camera and want video (though I know the Razr can't take video). Please help this technologically limited girl!

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