Warning - old iPhones may be uninsurable
I had a couple of iPhone 4Ss that were stolen from home along with a load of computer equipment.
The insurance company understandably are saying that they're not paying out unless I get the IMEIs blacklisted.
Unfortunately, because the phones are not currently in use (they were upgraded to iPhone 6) and I didn't purchase the phone from a carrier (got it in an Apple Store) they are having trouble blacklisting the phones.
So a couple of bits of advice:
1) Sell old iPhones as soon as you stop using them!
2) Consider the hidden perils of buying phones from Apple Store (or other shops)