BlackBerry KEY2 128 GB Black

BlackBerry KEY2 128 GB Blackberry K10 128GB Blackberry K16 128GB Blackberry K16 128GB Blackberry KEY2 256 GB Blackberry K28 256GB Blackberry K28 128GB Blackberry KEY2 256GB Blackberry K28 128GB Blackberry KEY2 256GBBlackberry KEY2 512 GB Blackberry K28 512GB Blackberry KEY2 64 GB Android Nougat 2.1.1 Nougat 2.1.1 Nougat 2.1.1 Nougat 2.1.1 Nougat 4.7 Nougat 4.7 64GB Android Nougat 4.7 64GB Android Nougat 4.7 64GB Lollipop Nougat Nougat Nougat Nougat

What is a ROM?

A ROM is a code that holds the information about an individual device such as data and voice call volume and a battery backup, but does not contain any other information such as a user-installed ROM. For example, a custom set of ROMs can be updated via OTA by simply installing one.

What can you do when you need to change the data held by a ROM?
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What are the differences between Noug