i am glad to hear from you. by the way, i am so sorry that my cell phone was off when you called. here is the way to contact me......
I'm very happy to hear from you. But sorry for my cell phone was turned off today so that you couldn't contact me. I put my contact information as the following:
Received your letter very happy, today is really sorry, my phone turned off, so that you do not contact me, my way is an effective link