Queen Elizabeth has smartphone or whatever phone - family only yes, but does have one and it was Harry who thought her to use one

 https://www.msn.com/en-xl/lifestyle/celebs/queen-elizabeth-only-picks-up-the-phone-for-these-two-people-royal-expert-says/ar-AARdmWk?ocid=msedgntp 

p.s. and I will not make announcement about your retirement or afterlife as you stated would be case withing 6 months of Phillip's death.