incomplete recharging of cellphone...

Most of the times i just used my cell phone before getting it fully charged. Really it is not good for the battery. It really decreases the charge holding capacity . I am well known about it but still i uses my phone during charging to attend to some calls.

Generally that's not a bad practice at all. Battery has a life charging cycle. What is a charging cycle? Every time you recharge that's one cycle. For example, I am charging my battery now, that doesn't count as one cycle, but the moment I pull out the plug, then charge it again, that constitutes one cycle. So to avoid getting your battery to perform poorly, the moment you pull it out of the plug, don't charge again immediately. Just wait for it to go low and then that's the time you charge again. The battery has a life span of only one year (except for apple batteries), so expect a decrease in the performance after that. To not destroy my android phone battery, when there's an unexpected power interruption while i'm charging, i pull it out of the charger and doesn't charge it until the battery is low.

I have no knowledge of this being harmful to a cellphone, but it certainly a bad choice to part charge it on a regular basis because you will never have a full battery. I can understand you removing the charger if you are going somewhere, but surely this should be a rare thing. I always place my mobile phone on charge overnight, so that it is constantly charged.

I think it depends on the brand or the usage of the cellphone. I do have 3 cellphone including on my daughters use. There are all more than two years now but there batteries are all still fine. I charge them when there are already sign of low battery and I always charge them at night while it is not in used.

It is just fine, and it is much better than leaving it charging because it will reduce battery life. Just make sure that you fully drained the battery before charging again =)