The Text Messaging community had in effect, an earthquake last week, due to a discovery by pod2g. It was discovered that iOS shows the SMS UDH Reply Address within the user interface, instead of the original source number. In a nutshell you can send message from a normal on-net handset that appear to be coming from elsewhere to iPhone devices.
Different carriers will have different ways of dealing with the UDH content and you may find that your carrier strips it out, but on Vodafone New Zealand, the UDH data is transmitted fully to the recipient handset. It [...]