In case when someone gets lost ones cell phone, as a result he\she gets lost all phone numbers of friends that stored in phonebook.
That's why it would be logically if mobile service providers could offer a service of recording phone numbers from phonebook of telephone subscriber. All phone numbers from your SIM-card would record periodically in special database and in case you get lost your cell phone all records could be accessible and available to download on your new cell phone. What do you think about this idea?