Effective immediately, the Church’s 65,000 missionaries are authorized to communicate with their families each week on preparation day by text messages, online messaging, phone calls and video chats, in addition to letters and emails.
See more here: https://www.thechurchnews.com/global/2019-02-15/latter-day-saint-missionaries-can-now-call-text-home-weekly-first-presidency-announces-49001
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