The problem is which one? I don't use iMessage much, but there isn't One Alternative that everyone has conglomerated on. Some groups use Whatsapp. Some use Fa

The problem is which one? I don't use iMessage much, but there isn't One Alternative that everyone has conglomerated on. Some groups use Whatsapp. Some use Facebook Messenger. Some use Discord. I jump around between all of them. But if you have someone's phone number you can at least text them.