Don't pay to find out how to do it.Just engage and dis-engage seat belt buckle 9 times in under 1 minute and the chimes for non-use will stop. Repeat to re-enable.Top tips like this can be found by Googling...
If you can use a computer (and you're reading this, so that's a start), you can unlock your iPhone for free. Since ebay don't like web links, you'll have to use Google, but "ZiPhone" or "iLiberty" or "Pwnage"...