why is there a cellular data download limit on my lumia 950? i have unlimited phone data but no wifi

I have unlimited cellular data every month but no WiFi currently due to moving.i have found there is a restriction on downloading content on my phone from the store of about 100mb. I can't find any way to use my unlimited data to download anything all I get is waiting for WiFi. Is there any setting I can use to force my phone to download these without wifi? And if not there should be

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