I'm applying to four master's programs. My former professor submitted his letter to the first two schools last month. But he has not submitted to the other two schools. One of them is rolling admissions so sooner the better, and the other had a "priority deadline" that passed last week so is now also rolling admissions. I've emailed him three times over the past 10 days but have not heard back.
One of the schools is clear that they won't look at your application until the letters are received.
I have the professor's cell number, should I text or call him about it? Should I give him more time before bothering him again?