Default Current network frequency widget/display

I have been playing around with the GSM and WCDMA band selections. If I select ALL, is there a widget that can show what frequency is currently being used?

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Current Devices:
Sony Xperia Z
Sony Xperia Z Tablet
Samsung Galaxy S2
Samsung Galaxy TAB
Netcomm 3G29WN2 with external 3G and WiFi Antennas

Previous Devices:
HTC One (loan phone)
Samsung B2710 (failed speaker)
Nokia 6220 (Broke screen)
Nokia X6 (What a POS)
ZTE T9 (Shouldn't have bought it)
Nokia 6101 (failed)
Nokia 5140i x 3 (Great old phones)
Nokia 6250 (The brick)
Panasonic GD30
Panasonic ??? (It had rubber buttons)