Many AT&T customers received a confusing email from the company saying 3G services are about to end and that they need to upgrade to a new phone if they want to keep using the network. This, of course, was met with scrutiny online. Many users assumed it was a scam, while others were upset by the short notice.
Source: LifeHacker – Will Your Phone Still Work After AT&T’s 3G Network Shuts Down?