Hi everyone, I bought a factory unlocked iPhone from the Apple Store. One puzzling thing I noticed is that in the settings info page (where it shows serial and IMEI numbers), it says ATT. Am I correct in that it just lists that because the SIM card the Apple store used to activate the phone in-store was an ATT card; and that once I put a different SIM card in, that will change and it will work fine? It's for a trip overseas, so I can't really test it out myself here. Thanks!