11.1. Either of us may end this Agreement by giving the other 30 days prior notice in writing. Your notice must include your mobile number and the signature of the account holder. You must pay the Charges during the notice period.
11.2. You may end this Agreement by writing to us if:
(a) we don’t do something fundamental that we should have done under this Agreement within 7 days of you asking us in writing;
(b) we tell you that there will be an increase in the line rental charge by more than the increase in the Retail Prices Index ("RPI", calculated as a percentage) since the last line rental increase and you write to us before the increase takes effect;
(c) we increase your Charges in the UK which have the effect of increasing your total call and usage charges (based upon your usage in the previous month) by more than 10% and you write to us before the increase takes effect; or
(d) we change this Agreement to your significant disadvantage including the change or withdrawal of Services (we will tell you if this is the case) and you write to us within one month of us telling you about the change. This does not apply where the change relates to Services which can be cancelled without termination of this Agreement.
11.3. We may end this Agreement at any time by writing to you if:
(a) you do anything (or allow anything to be done) which we think may damage or affect the operation of the Network;
(b) within 7 days of us asking you in writing you do not do something fundamental that you have to do under this Agreement (e.g. pay the Charges when they are due);
(c) we are permanently unable to provide the Services to you.
11.4. When this Agreement comes to an end:
(a) we will disconnect your Mobile Device; and
(b) you will have to pay immediately all Charges outstanding at disconnection.
11.5. If this Agreement ends before the end of the Minimum Period and you pay us the remaining line rental for the rest of the Minimum Period in one lump sum, we will reduce this line rental by 2%.