Unhappy [Q] hard to be located by wifi or network

hello,
I just brought a z2(l50t,china mobile version),rooted and installed the gms. for being located by gps is ok,but is hard to be located by wifi or network,
for kitkat, there is no networklocation.apk anymore. I don't know which apk will active the LBS. and in my settings/location, it seems no way to setup.
pls give me a hand.
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