if you voice chat for 24/7 with who-so-ever online using pc-to-pc you will end up using 8 KBps * 3600 * 24 * 30 bytes. divide it with 1024 that many MB. besides different VoIP client uses different codec's and they are all SIP based but the codec weight is normally a standard 8 KBps g729.x variables. so you may end up using less than 1 GB just on voice chat where you and your family can keep chatting 24/7/30 (assuming 30 days a month). and since you got unlimited plan from the ISP subscription? you can transfer the mic to your mom/dad/bro/sis/neighbours/et al and there also he can give to all a,b,c,d,e,f,g,h, et al and keep chatting. if you still didnt understand this math? may be give me your address i will send you a calculator and you can also calculate while PC-2-PC chat. ;-)more than education and money and training? we need to use common sense, the that thing not commonly found commonly.:yahoo: