Protests in Belarus and no reliable Internet. How to communicate?

Belarus is fighting against election fraud for the third day right now. It is not clear what is going on with Internet - it is not blocked outright, but most of packets are lost or something. Some believe that it is DPI infrastructure is the culprit - it simply not being able to handle increased traffic.

Unfortunately, it also means that any messenger relying on internet works intermittently at best. So far Telegram appears to be the most reliable messenger, but it also struggles to keep up.

What options are available for owners of ios/android devices to stay connected with each other? Downloading anything from app stores becomes a problem as well, btw.