What do I do if I can't add new contacts to WhatsApp on my phone?

You save them to your internal or external storage by exporting them using the EXPORT TO STORAGE option from your Contacts settings. You can also import them any time you...

In your settings you should be able to save your contacts on the Nexus 6 to a Gmail account or any account you're using. Then sign into your Google account...

iCloud will sync all contacts that are in "On my 'Device'" group. Make sure that these contacts are not saved in Gmail account or similar.

It is very easy to transfer contacts from one Apple device to another. You just need to turn on Contact Sync in Settings -> iCloud -> Storage and Backup. Make...

The official WhatsApp Web version doesn't support adding a new contact. But you can use some tricks with a third-party extension InTouchApp to add new contacts.

You are out of space. You have to delete items in order to add more.

You can either switch your SIM card from your old phone to your new, or restore your contacts using a backup of your old phone. You could also ask your...

Yes, you can. You can use apps from play store that allow multiple profiles. There are many. On a rooted device you can use titanium backup and create a new...

You can but don't wait too long or you'll lose your number. Maybe three days maximum, then you may have to start a new account and get a different number...

When you open the contact's details to be edited, scroll to the end of the edit options, and you will find the button for link contacts. Here you can link...