I have a Lumia 930 running the latest slow branch tech preview and I recently upgraded my data plan from 3G to 4G/LTE. But now the phone is consuming battery like crazy even when I'm not really using it that much during the day. So I wonder If I could force it to use 3G and if I could switch to 4G again when I need it (eg. When watching Youtube or Netflix etc.) To reduce this ridiculous battery drain?