gukPhone	Skype	SipGate
Software installation:	No	Yes	Yes
Hardware installation:	No	No	Yes
Connection fee:	No	Yes 0.045 Euro	No
2 Min. Call to Germany Frankfurt:	0.04 Euro	0.085 Euro	0.052 Euro
2 Min. Call to Germany T-Mobile:	0.24 Euro	0.505 Euro	0.53 Euro
2 Min. Call to Buenos Aires:	0.04 Euro	0.085 Euro	0.092 Euro

gukPhone do not charge a connection fee, the comparision do not show Special Offers or Traffic Plans.