Slowly but surely, the Skype chat app managed to reach 1 billion downloads on the Android platform. The news was revealed directly by Skype through its official account on Twitter.
An unlocked phone means a device that is not associated with any carrier, plan and support global frequency bands so it can be used in other countries. When choosing a plan, insert the carrier SIM card into the phone, and you are ready to go. If you decide you want to change your carrier later or want to travel abroad, it's as simple as replacing your existing SIM card with your new SIM and activating your new plan.