3210 signal problem

[wam2610]

Hi, I've just bought a 3210 on eBay for a ten pound buy-it-now and although the phone is in excellent condition I am having a very low signal strength display. I've tried changing the antenna and also fitted a ($19.99 haha signal booster) and this has had no effect on the problem. I've read somewhere a software update can cure signal problems? It's V05.31 (24.05.00) can anyone offer me guidance before I put it back on the Bay and sell it as **faulty**

[gorandj]

it can be pa, antena switch also