Egyptian mobile phone numbers changing from October 6th 2011

Update 7th October 2011: If you are calling or texting someone from an Egyptian phone, they will receive the call or message for now, BUT contact information is lost so they will not know who is calling or who is texting (unless they have edited all their contacts).
PLEASE SIGN TEXTS WITH YOUR NAME SO THEY KNOW WHO IT IS FROM!

New mobile phone numbers will be 11 digits long, up from 10 at present.
There will be a 4 month overlap period when you can use the old and new formats.

Egyptian mobile phone numbers to change from 6th October 2011

Etisalat 

Current 10 digit numbers, which all start 01, will take an extra 1. They will now begin 011

Current 11 digit numbers, which all start 0152, will change the 5 to a 1. They will now begin 0112

Mobinil

Current 10 digit numbers, which start 01, will add a 2. They will now begin 012

Current 11 digit numbers, which start 0150, will replace the 5 with a 2. They will begin 0120

Vodafone 

Current 10 digit numbers, which start 01, will add a 0. They will now start 010

Current 11 digit numbers, which start 0151, will replace 5 with 0. They will start 0101

Pictorial display of the changes:

I saw this on Facebook, but I don't know the original source of this graphic.  If the originator contacts me, I will be happy to make due reference.

The phone providers are probably going to supply you with tools to change the numbers automatically from 6th October, so don't panic into changing them all manually just yet!