Just wondering if anyone ever ran into this situation:

Customer had an i830. Went to Germany, worked fine for voice, no data could be gotten, data support tried to fix it, couldn't. Came back to the US and it's not working in CDMA mode. It will never acquire a signal even with soft reset, hard reset, flight mode on/off, etc. Basically she got a replacement from data support. The replacement she gets does the same exact thing, which is quite strange... so from here is it the handset or something wrong in the system causing her to have all these issues, and what's the fix?