WhatsApp works by using a "keep and forward" system for exchanging messages involving two end users. Whenever a user sends a information, it can be stored on a WhatsApp server, which attempts to forward it to the addressee, and regularly requests acknowledgement of receipt. On May well 10, 2016, the https://walk-in-cooler-repair-sea75318.salesmanwiki.com/9051892/5_easy_facts_about_commercial_refrigerator_repairs_in_seattle_described