Zer01 will launch its "True" mobile VoIP service in the US on July 1st.

Making the announcement at CTIA Wireless, the company said the unlimited voice and data plan will cost USD $69.99 and will support Windows Mobile 6 and newer smartphones.

However, it expects to expand onto the BlackBerry, Android, and iPhone smartphone platforms ‘within months’.

Users can either use their existing unlocked handset or buy one from Zer01’s online store.

Zer01 has data agreements with multiple national and regional GSM carriers for its unlimited mobile VoIP calling service.

The service works by using Zer01’s Veritable Mobile Convergence (VCM) technology, which bypasses carrier circuits by using VoIP – calls are sent instead into a virtual private network.

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