Default [Q]

I recently damaged my old sim card and got my replacement two days back.
after i started using this sim card, in the scrolldown menu / lock screen, where the network name is displayed, i get: 'EE@@@@@@@@@@'
now EE is my network. but these @s came out of nowhere. they arent there without this sim card
i have already ordered another replacement but meanwhile any quick fixes? maybe a way of changing the exact text thats displayed there?

specs
gt-i9300 non-lte
EE network (which functions normally by the way)
android 4.3 stock (can bee rooted if fix requires so.)
also this sim card has the so called quicktap / contactless payment feature and the previous one didnt
anything at all?
i rebooted, reflashed the firmware and also tried cyanogen. no use.