AAT SIP App is application dedicated for AATs service that enables VoIP calls over 2G, 3G, 4G and Wi-Fi environment. Wide selection of codecs ensures high quality audio calls. Main Features: - Deafult G729 coded- Contacts list integrated with native address book - Favorites- Detailed call history - Echo Cancellation - STUN

AAT SIP alternatives

NorthEast Voip Phone

Most recommended Voip phone AppNew works faster on iOS 5.0 and iphone 4SCall your friends & family, National and International with youriPod/iPad/iPhoneWorks on WIFI, GPRS, EDGE or UMTSHD Quality Voice call Europe,US,Canada,India from $1centAfrica very low prices. Super saver International calls No Hidden costs. For iPod Touch 1st generation users you need to upgrade your iPod to iPhone/iPod OS 2.2.1 or above and you also need external microphone.

ICU CALL

.Making and receiving SIP calls. Built-in tunnel for passing thru voip blockades. Support for codecs g729.Compatible with IPod and IPhone 2G/3GPlease, check your cellular operators terms of agreement to make sure they allow sip calls on their network before using ICU CALL

Linphone

Linphone is an open source app offering free audio/video calls and text messaging. With Linphone, you can be reachable at any time, even if the app is closed, with a WiFi or 3G/4G internet connection. Contact Belledonne Communications www.belledonne-communications.com for any specific development query.

Smart Call Dialer

Media5-fone SIP VoIP Softphone

IMPORTANT:Media5 Corporation announces the End-of-life (EOL) of the Media5-fone SoftClient on all platforms, including Media5-fone Free, Media5-fone Pro, and Media5-fone MPS, starting on August 31, 2018. Until then, support will be limited to fixing selected bugs and no new improvements or support on Operating System (OS) versions will be done. Please ask your mobile network operator before enabling the VoIP over 3G feature.