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2) Tap on Build number seven times to enter Developer mode. During the process, you’ll
see a prompt with a countdown reading “
You are now X steps away from being a
developer.” When you see “You are now a developer!” showing up, you have succeeded
in entering developer mode.
3) Return to
Settings and tap on “ Developer options”, switch both Developer options
and
USB debugging to “On” , and tap on “OK” on the confirmation window.