Why the direct version fails
You are always on your phone is a statement about their character, and people defend their character rather than examine it. The reply is almost always a counter-example, and now you are arguing about whether the claim is literally true instead of about how you feel.
It is also usually not what you mean. What you mean is that you were in the room and it did not feel like it.
Say the moment, not the pattern
One specific evening, described without a verdict attached. Last night I was telling you about work and you were looking at your phone, and I stopped talking.
That is hard to argue with, because it happened. It also gives them somewhere to go other than defending themselves.
- One moment beats a pattern. A pattern invites a rebuttal.
- Describe what you did, not what they are. I stopped talking, rather than you never listen.
- Leave a gap afterwards. The first thing they say will be defensive and the second thing usually is not.
Ask for something they can actually do
Less phone is not a request, it is a mood. Nobody knows when they have complied.
Ask for a shape: no phones at dinner, or the hour after we get in, or not in the bedroom. Specific, small, and checkable. One of those, kept, changes more than a general promise to be better.
Offer to do it too, if it is honest
Making it mutual is genuinely easier to accept and it is the right call when you both do it.
But do not pretend to a problem you do not have to make the ask more palatable. A fake symmetry falls apart the first time you are on your phone and they notice, and then the whole thing was a manoeuvre. If it is one-sided, say it is one-sided and say why you are asking anyway.
When it is not about the phone
Sometimes the phone is where somebody goes because the room is uncomfortable, and removing the phone leaves the discomfort with nowhere to go.
If the phone rule works and the evenings still feel wrong, the phone was the symptom. That is worth knowing early rather than spending six months tuning app limits.
Common questions
Should I just use a blocker on their phone?
Not without them asking for it. An arrangement one person imposes on another is surveillance, and it is answered with a second device. The version that works is one they set up and asked you to hold.
What if they agree and then do not change?
Ask what got in the way, once, without a verdict. Usually the rule was too big. A smaller rule kept is worth more than a large one agreed to and dropped.