How can I know someone receives my text message ?

[iMore Question]

I use a package from Lycamobile. I notice that others with ATT, T-mobile, etc. can see notifications like "read", "delivered", sent... after they send their messages. I use iphone 4s with updated iOS. My friends using iphone 4s also see their notifications, except that they use different providers.

 

[Just_Me_D]

The recipients must has enacted the "send read receipt" option on their devices in order for you to see that they've read your message(s).