Android Icon pops up on the phone startup

[dhaaaiiilan]

How come the android icon pops up with an exclamation mark (!) on the phone's startup?

[Uliwooly]

Does it happen everytime you restart your phone? 

@dhaaaiiilan

[Jake-SonyXperia]

Hi dhaaaiiilan,

Welcome to the community,

Does the phone actually turn on after this logo appears, or does it power down?

[Sachin4u]

Does this happen only at startup? Or does it remain like that. Can you use your phone normally.