HTC touch flash filesystem gets corrupt when searching for signal

[tichi]

Dear Experts.
I still enjoy my old trusted HTC Touch.

However, now I spend a lot of daytime in a building where the radio signal is very bad or completely absent.

In the result, my HTC Tough continuously searches for radio signal, and very often, it turns off the radio by itself, so that there is a cross on the taskbar (like one can do in the Communcations Manager).

Somewhere during this searching process, the main filesystem (but not the one on SD card)
gets corrupt (system files not found, cannot boot the phone) etc..

Hard reset helps. But it is very annoying to do a hard reset every week

Is this a known trouble?

Can someone suggest a remedy?

Thanks in advance, Tichi