Keeping
your number is easy when you find a new SIM Only deal you like.  Texting 65075 from your Mobile for a PAC
(Porting Authorisation Code) allows you to take your old number with you when
you change service providers. You get this within a minute after texting.  Once you have it give it to your new provider
online and then your old number will transfer to your new SIM within two
working days. Simple.