Bro may i know wat kind of built in wifi u used so dat we can answer ur problem direct, bcuse bro most of d built in wifi they only limited range of connection in terms of WIFI, bcn unya maka kuha raka ug 15/25 percent of connections or may be ubos pa gyud ana dba. so simple suggest for ur problem is to buy a WIFI Router ur problem is solve just only a minutes of configurations u hv a good wireless connections... ill suggest this type of router u buy LINKYS Wireless-G Broadband Router WRT54G note; router hv a 4 port dats: all bro i hope this can help u