You use your fingers to dial, so it's only fitting that your mobile phone is growing a digit right back; September 1 will be the historic day that every Thai yuppiephone number expands by one numeral; people will have to dial "08" instead of merely "0" to begin their call; to complete the greatest practical joke by Thai civil servants since the Sukhothai era, fixed line phone numbers will stay the same, to thoroughly confuse overseas callers - who don't dial the "0", but will sometimes (but not always) have to dial the leading "8" to reach Thailand; leave a few hours at midnight on August 31 to re-enter some but not all of the numbers in your phone book and speed dial directories.