Sensitivity of the tuner of the Nokia DBOX2

[piratt]

I want to ask is it possible to improve the sensitivity of the tuner to change Nokia DBOX2 by any draiveri for tuners and you depend on the particular image as a series of tests I found my Nokia DBOX2 AVIA500 that weaker transponders on Astra2D where the BBC and are ITV is a bit sensitive and not some hack my signal than new receivers as Echosmart DSB791?