The network has partnered with Lookout (a leader in mobile security) to pre-load Android phones and tablets with the Lookout Mobile Security app, which automatically scans apps and files for malware, viruses, adware and spyware.
If you’re on EE though that’s no longer necessary. There are a variety of security focussed apps available for Android phones but in general you have to hunt them down and download them yourself. Smartphone security is important, especially if you’re banking, using your email or accessing other sensitive data on your phone. Lookout Mobile Security app lands on EE smartphones and tablets