WhatsApp is raising the bar of messaging apps by continuously delivering new and exciting features. Now instant messaging network WhatsApp is offering a joinable call feature with multi-device testing programs to certain of its users who have signed up as beta testers. Users will be able to utilize WhatsApp Web, WhatsApp desktop, and WhatsApp portal even if they do not have an internet connection on their primary phone, thanks to the new functionality. Multi-Device Support Feature ...