​The SS7 vulnerability

Only For Education Purposes 

You have a phone and a sim card right?
You can send messages and receive calls

What is call roaming?

When you leave your country to maybe Siberia. If you turn on call roaming, whenever you leave your country

Your phone will tell your ISP
Hey I am no longer in Ethiopia so send all my messages to Siberia so that I can receive them
Get it?

That's call roaming
You are roaming in another network in another country

How does ss7 work
An attacker will write a script that says

Hey I am at {attackers location} so send all my messages here
Even though you are not roaming
Your ISP will forward all your messages to the attackers number

Now imagine if the attacker tries to hack your TG account
Telegra will send you a message with a code

If your ISP forwards that message to the attacker, he can use it to get in to your account and you wouldn't even know

That's all for now