Sometimes you might not like to let the people who call you that you switched your phone off but rather you prefer telling them that your line is unreachable and if you don't know how i will tell you some alternative ways on how to do it.
First it started few years ago when all Nigerian network operators activated these features and when your phone is off any person that calls you received an information that your phone is currently switched off but when your phone is out of service you will receive info that the mobile line you are calling is unreachable at the moment.
Now let assume you want to rest for a while and you don't want to switch off your phone but make it unreachable then follow this simple steps.1. Offline mode
Some mobile phone has the offline mode features that will enable you turn your phone offline once you don't like to receive any calls or either let your callers know that you deliberately switch off your phone.
To put your phone in offline mode simply swipe your phone main menu up and down and press the offline button but for some phone you will need to go to MENU-SETTINGS
.2. Flight Mode
Flight Mode is another way to make your mobile phone unreachable and to put your phone in flight mode in a phone like Samsung you need to follow this method MENU-WIRELESS AND NETWORK
then Press fight mode button and anybody that calls you will get a response that your phone is unreachable and not switched off.