Q. Re- question above (785) on twitting sefira on a phone. Would someone who can’t speak comply with sefira by using the sign language he always communicates with? Or if you are asked what is the sefira today, can you reply by counting with your fingers as we often do?

A. Horav Shlomo Miller’s Shlit”a opinion is that although twitting is indeed similar to writing and if you maintain that writing is like speaking, you would comply with sefira counting. (See question 785 above) However, you cannot use any sign language for sefira counting, since for the purpose of this particular mitzvah that requires actual counting, it is not considered as verbal counting.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a.