Premium service abusers are so stealthy that you won't even know that your device is contacting premium numbers or doing other activities in the background that could cost you. Knowing how you can avoid them could save you from paying high prices.
Many Android users don’t really bother updating their OS. As long as they can perform basic functions like make calls, send messages, and install apps, they find no need for it. What they might not know is that those updates are critical.