My Dad is consiring going with CHATR, a no frills prepaid MVNO on the Rogers network. Their $25/month unlimited in province calling plan sounds like a good deal. MTS is selling their LG F4NR for $29, the lowest price right now. Can he insert a CHATR SIM card into the LG F4NR and will it work without unlocking? I previously read that for MTS's 2G/HSPA network it is a MVNO on the Roger's network like Cityfone, Petro Canada Mobility, Speekout Wireless and CHATR.