In general, it is not possible to register the same mobile phone for two different EU LOGIN accounts. 

However, for European Commission staff who have accepted the BYOD (Bring Your Own Device) policy, it is possible to manage both an internal and an external EU LOGIN account on the same ANDROID device by installing the EU LOGIN app twice (once in the personal space and once in the work profile). 

Staff who need support with the installation in the work profile should contact the IT Helpdesk.