sprint x1526 cm12.1 build 54 wifi cannot get IP and carrier selection problem

I tried to google, but cannot figure out the answer. Please help. Thanks!

It is a sprint x1526 with LTE. Installed cm12.1 20150927 build 54.
Q1: Wifi cannot get IP.
Q2: the carrier network is set to boost, and there is no data since my network requires sprint. I need to switch to sprint to get data/LTE. I can make calls.

Thanks in advance.