Can I login to multiple organizations and accept invitations from my mobile app?

Can I login to multiple organizations and accept invitations from my mobile app?

Yes, you can login and switch between orgs from your mobile app. However you can accept only the first invitation that you receive. For example, if Org 1 sends you an invite you can accept it but you won't be able to view the Org 2 invitation in your app. 
Multi-org is supported in the following versions of the CRM mobile app: 
  1. Android - 3.4.5
  2. iOS - 3.5.3