I don't know the how to get the cold wallet to store my btc. Do u know any cold btc wallet for android phones. Bcoz , I didn't use my pc much.
Bither has option for cold wallet. If you have a spare mobile, you should give it a try. You will be storing private keys in one phone and you will be monitoring all addresses from another phone. Bither will do everything for you. If you only have one phone, alternatively, you can use Bither wallet in PC which will help you to use either your PC or mobile as cold/hot storage or you can just use Bither hot wallet. You should be cautious when installing apps from unknown developers.
it is better to make a paper wallet , maybe in two copies and put them in safe places ?
you save the public key and every time you will send him the BTC .
even if you do not use the computer a lot , once created and printed , it's done .
if the phone is broken there is no way to recover the cold wallet installed inside?
It is good to create a paper wallet and keep it in a safe place. Make sure others doesn't have access to it.
If you created an HD wallet in Bither, you can recover all Bitcoins in that wallet by importing the seed associated with it. It is better as all the addresses you create in that HD account after backing up the seed is also recoverable bu importing it. So I recommend you to use an HD wallet. Bither is recommended or you can use Mycelium.