PhoneLeash can help you find your phone if you lose it (that's old, I know, stay with me!). You can send commands to it via SMS that look like this - "locate <password>" - and you'll get an email back with a Google Maps URL. Easy! If you think its somewhere nearby try: "ring <password>". It'll make the phone ring loudly, even if it was set to vibrate. If you forget these commands, send "help <password>" and you get an email with help! It'll also email you when the phone battery is running low - better find that phone fast now!
But should you have to miss calls and SMS just coz you've lost your phone? NO!!
So PhoneLeash also forwards your SMS to email (or another phone, via SMS), and emails you all the calls you're missing so you can call back. You can even reply to your SMS. You text (or email-to-SMS) your reply back to your phone, your phone sends it onward like you typed it in yourself. Clever!
Maybe you won't even need to find your phone More at www.gearandroid.com
Its free, do try it out! Thanks!