Signal Level does not display in NotifyLink User Statistics, since this field is one that is not supported by the ActiveSync protocol.  B1233

This has been observed with the:

-LG Enact, Enlighten, G2, G3 Vigor, Intuition, Nexus 4, Optimus 3D, Optimus G Pro, Spectrum, Thrill 4G, and Viper 4G LTE
-Google Nexus 6
-HTC Desire X, Droid DNA, EVO, First, Incredible 4G LTE, Nexus 9, One M8, One max, One S, One X+, Wildfire S, and Vivid
-Huawei Ascend P1
-Samsung Stratosphere, Galaxy Ace 3, Galaxy A5, Galaxy Alpha, Galaxy Grand, Galaxy S II Epic 4G Touch, Galaxy S II LTE, Galaxy S II Skyrocket, Galaxy S III mini, Galaxy Note II, Galaxy Note III, Galaxy Nexus, Galaxy Victory, Galaxy S5, Galaxy S5 Mini, Galaxy S6, Galaxy S6 Edge, and Galaxy Xcover 2
-Motorola Admiral, Atrix 2, Droid, Droid Bionic, Droid 4, Droid Mini, Droid RAZR, Droid RAZR HD, Droid RAZR M, Droid Turbo, Droid Ultra, Milestone 3, and Photon Q
-Pantech Element and Flex
-Fujitsu F-12C Globetrotter
-Amazon Kindle Fire HD
-Kyocera Rise and Torque
-Sony Ericsson Xperia Z, Xperia Z3 Compact
-Sharp Aquos Crystal

Other native Android devices may exhibit similar behavior.