As the dust of excitement settles on the advent of the new Android 5.1 operating system, it's worth noting that there is one group of people who have no reason to smile about this new operating system venture. These are the phone robbers. This is because the new operating system has made sure that even after stealing a phone, nothing good can come out of it. This is the Device Protection feature that has been introduced with the new OS.The knack that has been applied here by Google's big brains is a feature that makes the phone remain in a locked state even if the thief resets your factory settings. The key to unlock the phone remains in your hands. It can only be unlocked by you signing in with your Google account.This awesome feature has arrived built into the latest phone models as well as Nexus 6 and Nexus 9. Other amazing features that come with this new operating system include HD voice calling for compatible devices as well as multiple SIM card support.It cannot pass the attention of many that Google's neighbour and close rival, Apple, has also upgraded a similar OS that has a similar anti-burglar feature called the Activation Lock, which has helped curb theft of phones in New York and San Fransisco.

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What's my model number?

There are several ways to locate your model number:

Option 1
On your device, go to Settings, then "About device" and scroll down to "Model number"
Option 2
Often times you can view the model number inside the device, by removing the battery
Option 3
Using Samsung's model/serial number location tool

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