Why are you going through all that? does your android device not support pan? if it does then you just have to enable pan on n900, restart it, pair it with your android device (if paired before activating pan, unpair and re pair), then in your android device's bt menu, just click on your n900 a checkbox something like "use this devices internet" should be there, just check it and it should share connection. Im tethring my n900 to my android devices (a phone with v4.4, a tab with v2.3) like this and it works just fine without even root or shells.