I am using the Android Messages app to send an SMS to more than one person at a time. I get prompted with a message that "Messages needs your phone number" and a button labelled "Fix". I then get this dialog:


I have two questions:

  • Why does Android Messages need my phone number? Doesn't it know it already? Will I have to change it later if I change SIM card? I don't get this prompt when sending an SMS message to one person.

  • Is Android Messages doing something other than sending normal SMS messages here?

I'm using Android 6 and the latest version of Android Messages from the Play store.

  • It looks this is not an SMS: the screen says "group MMS", and none of the people I sent it to actually got the message, when they do receive normal SMS messages. – Flimm Aug 16 '17 at 8:14
  • I'm recently having the same issue with Google Messages when sending MMS (group messages) android.stackexchange.com/questions/205036/… – raddevus Feb 11 at 20:03

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