The slot cycle index is currently negotiated by a mobile handset and a base station. However, if the slot cycle index could be selected dynamically a mobile handset that operates more efficiently for the user would result. Talk time could be maximized when the battery, or other mobile power source is low, while connect time for a mobile call could be minimized when the battery is near fully charged or at times when the user is likely to make a mobile call. Additionally, location could be used to determine the likelihood that the user will make a mobile call. However, current network usage would typically need to be considered when determining if the slot cycle index should be changed. Mobile handset users could also charged for quicker response times, or mobile handset users on more expensive plans could be given typically faster response times. Many different things can be considered in determining when to adjust slot cycle index, such as, for example, battery power, time of day, or system loading. Additionally, combinations of factors can be considered to determine when to adjust slot cycle index.