Can any one tell me the procedure again for 4.4.2?
If you are talking about the Device Information *#*#4636#*#* Option that forces to use LTE only. Then you must be rooted first then download Advanced Signal Status on Playstore.
But if you are talking about the natural way. Just go to Settings > More Networks > Mobile Networks > Network Mode, then set LTE/WCDMA/GSM
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