why the modem crash??

[AC Question]

I have recieved a new galaxy s5 mini as a gift. now Its realy not working . suddenly an alert says .
MODEM CRASH! do not touch anything for 10 minute.
and afterward it goes to stand by with an android doll above and write CP CRASH!!!
I dont know why its happen ((

 

[Tim1954]

Sounds a bit like scareware. Turn it off and back on again, ignore all dire warnings and don't click on anything