All come with double Nectar points on Sainsbury's shopping & fuel for the 30 day life of the bundle. If multiple mobiles with bundles are attached to the same Nectar card, then you can get more points on your Sainsburys shopping. For example 2 phones means 3 times the points, and 4 phones mean 5 times the points. 
Mobile by Sainsbury's operates using Vodafone's network. As a result Mobile by Sainsbury's gives the same level of UK coverage as Vodafone—99% of the UK for 2G, and roaming coverage in over 200 countries around the world.