Weather App Problems

I currently am trying to use two weather apps on my Z1 that don't work properly, a Zooper Widget Pro widget and Weatherback . Both of these apps work as expected on my Nexus 7, but the locations seem to be off on my Z1. I do NOT have a data plan on my phone (but the Nexus obviously doesn't either). Does anyone have any suggestions for which settings I should check? My regular weather apps run perfectly on my Z1.

Thanks in advance.