It's quite interesting to note that Nokia is consistently reputed to have better reception than any of the competing companies, while still having the lowest SAR values.

Also, heating power per mass unit is not exactly useful when trying to determine how 'dangerous' radio waves are. Most dangerous effects (if any) probably come from molecular resonance, changing how easily some chemical reactions happen. Research data, however, is still sadly lacking.

I for one am not going to keep an 'always online' device in my trouser pockets