Simple CRM allows contacts to be synchronized with your mobile phone. See explanation on: http://www.simple-crm-support.com/2014/01/comment-synchroniser-votre-compte.html
However, we do not recommend this, as this synchronization will complicate your DGMP policy.
For example, imagine that you have 20 employees and all of them synchronize their phone contacts with Simple CRM. If a contact asks for a copy of all the information you have on him, it means that on the basis of the DGMP, you must go around the phones of your 20 employees, in order to take a picture of the contact card in each directory.
In order to overcome this complicated problem, Simple CRM is currently developing a mobile application that will be available at the end of the first half of 2018 and will allow centralized control. In other words, all phones will have the same information and in case of a request to delete a contact, the deletion performed in Simple CRM immediately update all mobile phones.