With Google Voice integration, users can make and receive calls/text to US phone numbers for free. If users just going to wifi, they don't even have to deal with a phone company - wired or wireless.
BlackVoib
Features
1. User controls all SIP account settings.
2. Supports more recent BlackBerry GSM phones only.
3. Supports G.711 ulaw codec.
4. DTMF passthrough via SIP INFO.
5. Speaker Phone and Handset can be toggled.
6. Volume Controls.
7. BlackBerry phone book integration.
8. Supports separate authentication ID.
9. Can contact server with a different port other than the default 5060.
10. Can use a different port other than the default 5060 as local port.
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Up Coming Features
1. Google Voice Integration.
2. SMS.
3. Enhanced Standby Time.
4. Device to Device Direct Calling (Do not need provider).
5. Rule Based Calling and Multiple Accounts.