A tweet said that there will be FREE USB tethering for Windows Phone 7, and carrier will not charge a dime. Hopefully, it is not just a rumor, as we all hate carrier for charging hefty fees for tethering. For example, AT&T charges $20 tethering fee, saying that the fee is justifiable because tethering provides values. Let’s cross our fingers that Windows Phone 7 will provide free tethering.