Hi, I dont have an ICD but a pacemaker and they have the same warnings as the ICD's and yes, I understand greatly as mine hurt too. My cardiologist is considering an ICD for me...I hope we dont have to go there.
All the information I received with my pacer indicated that I should use caution when using cell phone, any wireless (wi-fi) device, microwaves, and cordless phones. Actually, there was a whole list of things that could potentially shut down the pacemaker or cause malfunction. I do have a Dell Laptop that I use a wireless card in and have no problems, I have a cell phone that is one of the most current models via Sprint and dont have problems and we have 2.4g cordless phones in our house and still no problems. I was very paranoid of all these things last year when I got my device inplanted worrying that something was going to harm it...but everything has been fine.
A little funny though, we just got a brand new Best Buy store here in our town and I went there last weekend to look around. I set off their alarms going in and out...must of been the magnets or something I dont know...I didnt even have my purse with me or my cell phone just cash in my pocket. So I am sure it was my pacemaker that was the cause, kinda embarressing but it is still ticking along and the book with it did state that this could happen. Guess I wont be going to Best Buy again... 