WCDMA problem

I'm having this issue with WCDMA in which it constantly drops to 0 signal bars from full signal, and sometimes I even get disconnected from the network until it decides to jump to full bars again. This happens on all locations, ROM is stock XXLSC deodexed (got it from the user I9000 here in the General section) and the problem just keeps repeating itself. Signal drops completely, then jumps back to full, then fully drops again after a short period..it's extremely annoying since I can only use the slow GSM network, which is useless to me when I need fast internet. I called the network operator and they say they had zero reports on an issue similar to mine, so it's not them.

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