One way to show your spouse you care is to turn your phone off now and then. Make the decision to disconnect from others so you can connect with your spouse on a more regular basis. You will probably discover that turning off your phone once in a while will also lessen the stress in your life as well as giving you an opportunity to give those you love your full, undivided attention.
"... my own self-imposed policy of 'cell phone-free Sundays': no texting, no emailing, no checking the map. My phone is turned off, or usually not even with me ... maybe you can designate this Thanksgiving as a phone-free holiday and pay full attention to the person across the table, whether it's your bumpkin cousin or your snobby sister-in-law."
Source: Meredith Melnick. "Turning Your Phone Off as a Technological Gesture of Affection." Time.com. 11/23/2010.
Another way to help balance time you spend with others or for others and time you spend with your mate is to know when volunteerism is hurting your marriage. It is okay to say "no" when that "no" is a "yes" to your marriage.

My husband and I have been doing this (shutting off the phone),
since day one. When we moved in together, before we were officially married, we would both, receive a ton of personal
phone calls, that would ruin the moment, or cause alot of stress
during the day.. The idea that you have the power to shut off your own phone, speaks volumes in itself (no pun intended in the last sentence! lol)
I agree, except for the fact that my husband and I have children that do not live in our home. Keeping the phone handy in case of emergency is important to us.
In my circumstance, I suggest screening the calls.
If only we all lived in a world where this were possible. Many of us work on holidays and/or are needed for support for those who are….