hey im here all day everyday. you can message me off list any time you feel. im here to help you..
yes think of the airvana as a mobile handset you need to activate. sometimes they come already provisioned and sometimes they dont. all you have to do is call up sprint and connect to the airvana camp. thats a separate little department.
make sure you have installed everything and have placed the GPS antenna in the best position possible,, then call up the airvana folk.
once they confirm its setup, your done with them. bear in mind the GPS may not lock for an hour or so! this is perfectly OK and normal!!! dont think your system is messed up.
if a couple hours have passed, then try and re-orient your GPS antenna and see if it locks.
there are 4 (i think.. going off memory) lights on the airvana.. they each represent a service... GPS, LAN, etc etc... again i forget as im not looking at the gadget as i write this.
finally!! after all the lights are solid THEN you can use it. you do not have to do anything to your handset.. the airvana (femtocell) will broadcast to the sprint network and say "hey, i got this peeps! wafa's handset will come thru me and ill tunnel this traffic thru the internet backbone and THEN ill hand it off to the last mile.. k?" and the cellular network will say " oook Mr. Airvana... "
be advised that any sprint handset with the exception of nextel handsets (that use the iDEN network) will find your femtocel and be able to use it. this should not cause you any harm however if someone IS on your femtocel they will be using your internet bandwidth. this may sound more scary than i really is. im just letting you know this is a possibility. the airvana is strong enough to cover 3000 sq feet or something like that so a neighbor who has a sprint handset will "See" your airvana and connect to it.
now there is a page on your sprint account page that has a list you can put mobile numbers on.. what this would do is ONLY let those numbers be able to use YOUR airvana. so if you use this and your neighbors number is not on that list, they can have poor service.
see the Airvana will be so strong the neighbors phone will want to connect to it since its basically a cellular tower,, however that list you created wont let it, so the neighbors handset tries to connect to a distant, possibly weaker terrestrial tower. this could cause the neighbor to contact sprint and say "hey i used to have great coverage and now i dont.." well sprint can find out there is an airvana nearby and they could then just simply remove your list you created that only had the numbers you wish to use your service..
this is a SMALLLL.. SMALLLLL.. sMALLLLLLLLL..

possibility, however it HAS happened before and is documented across the world wide web.
so yeah that was WAAAY more than you bargained for however its here for your lazy reading as you wish if/when you have an issue.
for now though you dont have to do anything to your handset. once the Airvana is set up and the GPS is locked, you are golden. the handset will not know the difference. your battery life will be increased and your talk/call quality will be improved.
please if you have any more questions you can post them here. i do not mind answering. if i dont know the answer ill help locate it for you...