I tried rebooting my Mozart and it seems to retain the MAC address, with Mango (7720). ICS turned off.. Open market phone.
When I got the HTC update I noticed that the only version number which changed was the boot loader, which seems kind of weird since it looks like other phones had greater changes.
Mac filtering is not useless as a security measure. It's not used by itself. It's used in conjunction with other methods, the same way businesses also hide their wireless network's SSID.
I'm not filtering on an Open Connection. That would be retarded.
Seriously...
yea hiding your wireless SSID is also useless. Actually, it makes it worse because in order to connect one side will have to broadcast the ID. so instead of your one hotspot broadcasting it in the same stationary place, you'd be forcing every single client that wants to connect to it constantly ping the SSID's name everywhere it goes hoping for a response. have fun broadcasting your "hidden" network to the world wherever you go.
combining multiple useless measures doesn't make it any more secure, the attacker will just circumvent each one trivially in sequence. but the more you pile on, the more you make it a pain for yourself to actually use your network.
the bottom line is that if your network is secure already (i.e. secure encryption with good password), there's no need to add frivolous measures on top of that, and if your network isn't already secure, adding frivolous measures won't make it any more secure.
MAC filtering isn't useless generally, since you can use it for access restrictions of ignorant users or for other network management purposes (e.g. static leases, QoS, etc.), but it
is completely and totally useless as a
security measure.