I did that too; it lasted until I needed to enter the names of a few new contacts. Ouch. So when my mother-in-law asked what smartphone to buy a little later,

I did that too; it lasted until I needed to enter the names of a few new contacts. Ouch. So when my mother-in-law asked what smartphone to buy a little later, I bought one and left it on my desk for several weeks before I gave it to her, and during those weeks I disabled notifications on every app that activated itself. That worked well.