I hope this is the right Stack Exchange to ask this, but since RFID Cards are becoming more common and with new Microcontrollers a lot of home-built Internet of things devices can be RFID i figured here seemed right, if not i am truly sorry and will find somewhere else to ask.
I am wondering if it is safe to keep a RFID card in the back of a cellphone case (pressed right against the phones back) and to keep it in the case while using both the phone and the card.
Basically i keep my IPhone 6S in a drop-case and want to put my doors RFID proximity card in the back of the case so i don't have to carry an additional card when my phone is typically in my hand.
But i don't want to waste the money on the RFID card replacement, and more impotently i don't want to damage the 600+ IPhone.
Any help would be appreciated, little tid-bits i found around seems to indicate it would be okay, but i haven't found anything definitive.
Thanks in advance, Lin.