I paired the devices once and was able to send a created ringtone from my iMac to the phone. A little while later, I deleted that ringtone as it was being played in music. I now want it back and each time I attempt to send the file, it comes up with "Failed to establish connection with device". I have tried doing this with the phone next to the computer and up the next floor. I have tried with the phone in discovery and not in discovery. I have disconnected the phone and reconnected the pairings. What happened? They are still paired but now I can not send files. I put the file on a micro SD card so I can use it but what happened to my bluetooth connection for some other time?