iPhone sets off store alarms

It's been awhile since this has been reported here. I did a search back and last December someone reported putting the phone into airplane mode prior to entering the store took care of the problem for them.

Do you have a case with magnetic clips or anything magnetic on your iPhone? As those sensors are triggered by a specific magnetic response, it may be the case and/or accessories you are using.

Are you sure its the iPhone and not something in your pockets? (ie golf accessories, money clip, keyrings, etc)

I've been in and out of a couple of different Best Buy stores several times and other stores with security theft alarms you must pass through when entering or usually only required when exiting the store with my iPhone and it has never set off an alarm. Is this at one particular store only?

While most of the door alarm systems that work in retail establishments works via magnetic sensors, some work differently. As asked earlier, is this one particular store, or a number of stores?

I have seen in a couple of stores in our area where these are present that the automobile key transmitters (fobs) that unlock the doors and trunk can set these off, depending on how they are carried. One in our local grocery store will go off if I'm holding it in my hand, but if I have it in my pants pocket it is alright. In cold weather, if I put the keys in my jacket pocket, it can also activate the alarm. It appears the closer it is to the actual sensor, the better the chance of it activating.

Have you checked to see if your case has an RFID strip in it that was never deactivated?