There is a bug in the play store app that keeps it from recognizing your wimax connection you can do two things to get your apps updated. 1 Go to app management on your device in the all apps tab and uninstall the playstore update then go to update all your apps however this is just temporary as the next time you open the playstore it will be updated again. 2 You can try updating your apps on a wi-fi connection. I hope that helps, on a side note this also works on other wimax devices that are having the same problem.
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