Yes.. Enabling phone will kill the battery quicker, since this will consume battery power... Yes.. Buying a new battery could extend battery life... If you already have a fairly new battery, then maybe not... You could always buy an extended battery...
To extend it to 10 seconds, there might be a registry hack.. Check
this forum out and post a question there asking about it... You could always remove the battery and put it in when you wanted to turn the phone on...
The voicemail setting is to "delete voice mail messages and clear the voicemail icon from your homescreen."
I do not know about how to retrieve an old pin, other then to Hard Reset the phone.. If you already did this, and it still shows up, I don't know... Try inserting 0000 or just try inserting your own PIN...
There is a registry edit that enables Wi-Fi only connections.. I can't find it... Try searching in that forum I listed above... You may find something to fix this...
Oh... And welcome to PPC Geeks... A wealth of knowledge is at your fingertips.. I recommend you join the Coz Boogie Militia.. Go
here for more info on it..
To give thanks, you can click
also... Happy to help you... And GOOD LUCK!