Lately, more and more often, when I send someone some media content, after a while I get red dot warning it was not sent at all..?? Sometimes, it takes a while for that content to get delivered... Servers too busy, Viber???? Never had an issue with Signal, Whatsapp.. Also, sometimes can't answer incoming calls - pressing button does nothing??? And, lately, pressing message notificatione won't open the Viber and display the message - only will delete notifi Dissapointing, to say the least...