I upgraded to iOS 7 last night (iPhone 4 GSM). I am unable to turn off or delete any previous alarms that I had on my phone. As a test, I added an alarm last night. This morning it is greyed out and I can't turn it on or off, and cannot delete it from the list. Is this a bug due to iOS7 being beta, or do I have to downgrade to iOS6, delete my alarms and then put iOS7 back on my phone? NB- this is about the absolute limit of my technical knowledge, so any tips should be in laymans terms!! Thank you!