No specific type of phone is necessary to use SubAssistant as any device capable of receiving text messages or email can be use to receive notifications from SubAssistant. There is an optional app available for Android devices or the iPhone which allows you to receive push notifications. If you have an Android or iPhone, we recommend using the app as push notifications are generally faster and more reliable than text or email notifications. Again, this app is optional and not necessary to receive text or email notifications or accept jobs.