I heard from another Mom whose daughter is in Briana's zone. She said they have very limited internet time on slow computers. Here is the address of the mission home if you'd like to write Briana a paper letter. It takes 1-2 weeks. Her area is close to the mission home right now.
Sister Briana Barkdull
Brazil Belem Mission
Av Nazare, 532 Sala 412 4 Andar
Nazare Royal Trade Center
There is actually an accent mark on the second e in Belem but I can't make it on the computer. Thanks, she'd love to hear from you.