Complex sentence: The main defect of coverage in Italy of DTT is that it requires much time so that all the country can receive it adequately, however is possible on the Internet to verify the identity of the correct customer.
Split into simpler sentences: The main defect of DTT coverage in Italy is not yet available in all Italy, it will require much time before all the country can receive it adequately. However is possible on the Internet to verify the identity of the correct customer.