Can’t get the option of Text Message Reminder

I can’t get the option of getting Text Reminders when adding new event even though I added my mobile number successfully and my number is listed in “Devices” as “xxx's phone (xxxxx) Verified phone number”. I also set SMS services for Hotmail and Messenger alerts successfully and have the “Get text message notifications (reminders and changes to calendars)” in the Calendar option ticked. All this set correctly, but I still can’t get the option of a Text Message Reminder listed among other sorts of reminders (Email, Messenger, etc.). Lastly, I removed my mobile number and re-added it again to see if this could solve the problem, but no success. Any help on how to sort out this problem will be much appreciated.