Where users regularly tether to 12 or more devices or have used 650GB of data twice within a 6 month period then we may investigate to ascertain whether your unlimited data usage is in line with standard use and our Artificially Inflated Traffic (AIT) policy. In the event it is determined that usage is for non-standard purposes then we reserve the right to adjust the plan or to terminate the agreement. In addition whilst roaming outside of the UK on unlimited data plans, and within standard inclusive or daily roaming destinations, data fair usage is capped at 25GB per month whereby roaming restrictions and/or out of bundle charges may be applied for usage exceeding this limit.