However, WhatsApp has worked on the security methods of its platform and for this reason it is an application that does not allow you to connect from more than one device at the same time. This means that when you log in with the same cell phone number is going to close one of the applications.
In this case, the first option you can choose is to log in again writing the cell phone number, however this alternative is difficult if another person is doing the same operation at the same time. For this reason, we explain step by step what to do in these cases.