Best user interface that works with Asterisk

Downloaded 5 "SIP compatible apps" only to have iSip & WeePhone work with our internal Asterisk PBX. This app has decent call quality and has by far the best user interface of the apps that worked. I can now make phone calls from the bottom floor of our building that has no AT&T reception but excellent WiFi coverage. Save your self the cash of testing 5 apps and just purchase iSip.

ickysaidthis about iSip -VOIP Sip Phone