Ready to use:
1. Two phones without root access.
2. Download the APP from the token.im URL or an official APP store and make sure you have installed any new updates to the APP.
3. One of phone open Airplane mode as a cold wallet, keep it offline always because it's saved your private key.
If you want to use the cold wallet in imToken APP, you should watch the wallet at first.
note: one of phone connected network as a hot wallet to watch cold wallet, the other one keep offline for Authorized signature.
Step1 Hot wallet: click "Import Wallet" -> select Ethereum Wallet -> choose watch wallet -> click "Scan button" on the upper right corner, scan wallet address QR code from step2
Step2 Cold wallet: choose the wallet you want to be watched
Step3 Hot wallet: scan step2's cold wallet -> click"Next" -> generate QR code for "Authorized Signature"
Step4 Cold wallet: scan step3's QR wallet -> click "Next" -> input password -> generate "successful signature" QR code
Step5 Hot wallet: click "Next"button -> click "Scan" button -> scan signature QR code from cold wallet generated in step4 -> click "Confirm" -> complete
1. There is saved private key in cold wallet phone, so keep it safe and complete backup carefully
2. Keep cold wallet offline
3. Watch wallet can't finish transaction without "offline signature" from cold wallet