You will continue to find conflicting advice floating around regarding "conditioning" and "reconditioning" of batteries. I'll not be surprised if someone jumps in and contradicts me. But if you really go look at technical papers about the battery technologies themselves - the "conditioning" and "memory effect" which the conditioning was meant to address - are pretty much legacy from older battery technology - NiCad, and to a lesser extent (but still there) NiMH batteries. The current generation of Li-Ion batteries exhibit no memory effect, and don't require or benefit from any "conditioning" regimen.
The ONLY reason to consider anything like "conditioning" is to possibly re-calibrate the measuring technology within the phone circuitry itself which measures and displays how much battery capacity you have left. For that, there may be some merit to *occasionally* (not all the time) letting the battery completely discharge to where the phone goes off, and then recharge to 100%.