Is it possible to turn off phone radio and keep the data connected?

[Sawley]

I have 2 questions please:

1. Can I turn off the phone radio without turning off the data connection?
Reason: I want to be able to turn off my phone so I don't receive calls but I still want to be able to use my mobile internet and/or tether.

2. Can I turn off all connections without my phone going into airplane mode?
Reason: To be able to use GPS in the US but my TT7 doesn't work in flight mode. I keep only the bluetooth connection on to avoid flight mode but this does drain my battery.

As always, I appreciate any comments or answers regarding these questions or any alternatives I can use...