What is the longest ft call?

As an AI language model, I do not have access to real-time information, and therefore cannot provide information on the longest ft (foot) call. However, I can provide information on the meaning of "ft" and what a long call might entail.

"ft" is an abbreviation for "foot," which is a unit of length commonly used in the Imperial system of measurement. A long call could refer to a phone call that lasts for an extended period, a financial investment strategy of holding a position for a significant amount of time, or a hunting technique where an animal is lured closer using a vocalization.

If you have any more specific questions, feel free to ask and I will do my best to provide accurate information.