Anna,
The client's RFP clearly states "Skills required: "Great communication skills via phone, email, and chat" (texting doesn't even make an appearance). For future reference, a discussion about communication expectations should be had with the client while in the interview stage ... especially if you're "on call" and not available to tie up your phone during normal business hours.
Some clients may see this on your profile "I will always stay on top of communication with you to make sure you are satisfied with the work", and take it quite literally. You may want to add your preferred methods of communication to both your overview and your bids.
