recreating flipper zero

im new to the Raspberry Pi stuff. ive seen a lot of things about something called a Flipper Zero, ive seen a bit about it of what it can do. and it looks like something i could use on a day to day basis with how much i forget stuff. locking myself out of my house and just overall pranking friends. if there is a way to get one or more of the fetures to my raspberry pi 3 model B i would love that. the idea of taking a freqency of something like an electric door, and opening it from a far away just to mess with people sounds amazing and thats the main thing i want. if there are any extra products i need to make it work please tell me.

Opening other people's doors, whether with a lock pick or by hacking, is illegal and no fun but a security risk! Would you find it fun if anyone could simply open your door at any time?

no i wouldnt like that but the only reason im doing so is that i can mess with my friends and scare them

And who guarantees that it stays with "annoying friends". Instead, invest your energy in finding out how to prevent this from happening and annoy your friends so that their tricks no longer work.

alright. ill try to figure something out then. but since im pretty new to this stuff could you tell me what thing could open an electric door or something so i know what to protect myself from?

Search the Internet: How does a garage door opener work. Mostly they work with radio if it is wireless. There are many different radio frequencies.

and how would i be abled to find that frequency? i know guessing wont do the trick

By finding out about the different models and what frequency they use.

Basically it is always the same, find out how it works, then you know how you can manipulate it or protect yourself from manipulation.