We have received advice from Three that they will be applying firmware upgrades to resolve issues identified on their new infrastructure. The maintenance will be carried out of the following days; 23rd August 2016 - 23:10 to 24th August 2016 - 04:30 BST 31st August 2016 5th September 2015 We are still awaiting a full schedule from Three regarding the times for the 31st August and 5th September and will post a further announcement once the times have been confirmed. This affects only our Data SIMs.