find goal , reuirements and steps of the procadure text below

goal : to charge a cellphone
requierments : cellphone and phone charger as well
step :
- first, connect the cable charger to your cellphone and the head charger to the power socket.
- second, make sure that the flash symbol on the head-charger face upward
- wait until the battery icon appears on the phone screen
- charge the cell phone for 2 - 4 hours until the battery icon indicates that it's fully charged
- last, end the charging by pulling the charger out from your cellphone and the power socket