Business account needed with a minimum of 4 handsets. We have a problem most networks have poor coverage on site and the immediate surrounding area. The phones are for the use of workers in the local community who will spend only part of their time on site. We therefore don't want to commit to any network but need a flexible deal so that we can assess which network is the most suitable. Known issues Orange and Vodaphone poor O2 patchy others not tested. 3g connections from T mobile and Orange do not work on site.