I used the 65$ unlimited international call plan to activate my SIM card with Net10. I think the local and within US call quality is just like any other service but the international call quality is pathetic. It is worst than the typical VOIP calls too. It seems to be single duplex meaning that if one party is talking he cannot hear the other end speak even when they are talking. Imagine the confusion. Also the quality of tone is just impossible. It kind of takes the calling experience back by 10 yrs. Not happy.