We all know that Glo is one of Nigeria network. And most persons find it difficult to send Please Call Me to another glo user, incease you are out of airtime you can use this process to send a Please Call Me text to a glo line.
How Can I Send a Please Call Me. Text Message With Glo?
=> To send a please call me text message, kindly dial *125*Recepient Number#
=> For instance, if the mobile number you want to send the please call me text to is 08134746699, simply dial the ussd as *125*08134746699#
=> Then dial it and after that, your please call me will be sent successfully to the glo line.
This article helps a lot.
SOURCE - http://www.entprof.com/2016/07/how-to-send-please-call-me-to-glo-line.html