Since coming back from Uniden Repair and them doing some kind of firmware upgrade, my siren app is now communicating perfectly with my iPhone. Hmmm i wonder what they did? I just looked over the repair invoice and they did all the repairs plus the headphone jack and a firmware upgrade. I had done all the firmware before sending it in......???? Strange........But hey i,m not complaining.
Is it possible you were not using the latest sentinel when you updated the firmware? There have been a couple times when a new Sentinel was required - including on the last firmware dated earlier this month. I don't suppose you know the version you were using when you sent it in, do you?
If you use older Sentinel, it could say your firmware is up to date when it is not.