[Q] Which LTE Frequency band is my phone connected to

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http://forum.xda-developers.com – I've searched all around the web and I cant find a way to check what frequency band my phone is using for Samsung phones just dial *#0011# and you can find that info, iPhones also have a way, but I haven't found a way to determine this in my Xperia Z2. does anyone knows any way? any app or something? terminal command? (4.4.2 Stock rom) note: I want this because my carrier (Orange DO) is going to change their LTE band (and they're doing some test sometimes) and I want to know which band are they testing. (HowTos)