In areas without 2degrees coverage , handsets roam on Vodafone NZ 's GSM and UMTS network .
The network works with GSM - 900 , UMTS - 900 and UMTS - 2100 mobiles , similar to the competing Vodafone network .
In areas without 2degrees coverage , handsets roam on Vodafone NZ 's GSM and UMTS - 900 network .
The network works with GSM - 900 , UMTS - 900 and UMTS - 2100 mobiles , similar to the competing Vodafone network .