Is it safe to put my IMEI?
WhatsApp generates a password for each user. This password, in the case of Android devices, Blackberry and Symbian, is generated using the IMEI from the device where the account is registered in WhatsApp.
Do you have access to my IMEI?
Obviously not. We have no access to any account information. No phone, no IMEI nor contacts. All your information is private.
Can I use Wassapp at the same time as WhatsApp?
No. If you connect to Wassapp while using WhatsApp, Wassapp will be disconnected and viceversa, although WhatsApp reconnects automatically and transparently to the user.