Default Wcdma question

I use signal check pro. Since getting my n5 I have normally seen umts when the 3g icon is showing. All of the sudden today I am seeing wcdma when the 3g icon appears. I have never seen the wcdma before today. Now I'm seeing that in places around town that would always be umts. Can anyone explain why this would happen? It doesn't seem to be affecting my data though. Thanks

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Sent from my Nexus 5 using Xparent Blue Tapatalk 2