I have a blackberry phone and I was wondering what does really a Grey checkmark means on the Text (SMS) iv sent to someone I talk to a text message and it showed (Grey checkmark tick) for me for a long time now I still didn't get a reply and it their main phone number, does it means that they've deleted me? or their phone is off? or they're no longer using it and should I re send my message or just wait? Please help and thank you if you did 