avira – they do. They are removed from the geder of a karkafta who didn”t put on tefillin and become a head which did put on tefillin, making them zoche to olam habah.
From Shaarei Kedusha, Part 2, Shaar 8:
וכן מצות עשה להניח תפילין, אם היה קרקפתא דלא מנח תפילין מעולם, אינו קם בתחית המתים
Somebody who does put on tefillin, even once, wakes up for olam haboh.