Pretty noobish question, I know, but what′s the default key to press when you acquire the ability to use maximum radar, ceph airstrike and satellite?

Another thing: what′s the point in rebooting the suit?

I think the default is 'p', but it tells you what key to press if you look above the support bonus...

click P.
you can assign these "support bonuses" to another key, like 5. you can easily press 5 while walking with wasd.
maximum radar you just need to press the key. orbital strike is this beam thingy, the menu will open and you have to klick two times, first time where you want the beam and then in wich direction you want it. ceph airstrike will be cast automaticly by pressing P.

and rebooting the suit is kinda pointless for me, you get lvl 1 or 5 again and all your stats, modules etc. will be resettet. just to play it all again.
you get a nice dogtag for that and some C.E.L.L camos.

Thank you guys for the answers!

no problem