U
ulysses
Regular
If you are at home/office with wifi set up,your idea is ok.I have no fixed line adsl connection and we like the flexibility of everyone working out of their notebook+ data card.I have three androids in the house . ( Galaxy Nexus for me,Nexus-s for wife,Nexus one for kid)Every one has one sim in android and another sim in data card.Only wife uses anroid phone as the principal phone (voice+internet) me and kid use Dual sim ordinary phone with long battery life for permanent voice nos.All are pre paid and you can imagine renewing voice pack,sms pack,gprs pack, 3G pack for data card sim/ android sim/ normal sim etc.My galaxy nexus has a 3G sim but I dont make much voice calls out of it.( only for data and internet,mail etc)since you are stepping out rarely, you can keep an extra pre paid 3G sim and keep a 2 gb/4gb data pack. Look for a carry forwardable data pack so that you just put Rs 90/100 for say 100/200 mb every 30 days it will keep renewing till you finish.