How do I backup my Blockchain wallet?
After clicking the menu icon on the top left corner of the app you the just need to click ‘Backup funds.’ From there you can click ‘Start Backup’ and you will be given a series of 12 words to write down. These 12 words are your seed phrase which represent your private key. Keep these words safe. YOU SHOULD NEVER SHOW YOUR PRIVATE KEY TO ANYONE OR UPLOAD IT ONTO THE INTERNET. If anyone gets access to your private key they can get access to your Crypto.
With your wallet backed up you can now recover your Crypto with your seed phrase if you lose your phone with your wallet stored on there.