WhatsApp is not only a popular messaging app but it is also used by millions of users to make or receive calls. When WhatsApp is not working, there are a few tips you can try. Several users have said that they see this popup message as soon as they tap the call button in WhatsApp, and thus they are unable to make calls. However, WhatsApp users have said that they experience this problem even when they are not on another call. So, sometimes there is a valid reason for getting this error – if you are on another call. This video shows you how to get started on WhatsApp, including how to add contacts from your phone.Obviously, you can only make one call at a time – because only one call at a time can use your iPhone’s microphone, speaker, and camera. It's a messaging app, so it works in a similar way to texting. WhatsApp is simple to use once you get the hang of it. Can your company support the Age UK Telephone Friendship Service?.Back Volunteer for the telephone friendship service.Volunteer for the telephone friendship service.Lucky charms and rituals from around the world.Behind the scenes of the Age UK Lottery TV Advert.Spend or save: What would you do with £25,000?.What would you do if you won the lottery?.What’s the difference between a raffle and a lottery?.Who can you give your lottery winnings to?.

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