We have a problem with repeater, in 2g and u900, initially we blocked u900 and enabled only gsm900 &u2100, but when we open u900 we got good u900 coverage but call cant be initiated in u900, u2100 is working fine but we face no call established in u900, cant repeater work only in gsm 900 or u900 at a time as the band is same?? Its a winhap repeater. Pls reply asap thanks.