If the built-in file manager doesn't have the feature to extract the ZIP file, then you can use a third-party app. Just go to the location where you have downloaded the file, then select it and find the Extract option. For this task, you can use the built-in file manager of your phone. If the sample pack is in a ZIP compressed file, then you have to unzip it first. You can find them by searching on Google and YouTube. There are so many free sample packs available on the internet for FL Studio Mobile. The first thing you have to do is to download the sample pack on your phone. If you don't know how to import custom samples in FL Studio Mobile app on your iPhone or Android device, then this guide is for you. One of the useful features of FL Studio Mobile is that it also lets you add custom downloaded sample packs and load FLM project files. There are hundreds of free presets in FL Studio Mobile which consists of pads, bells, instruments (like a grand piano), bass and other sounds. FL Studio Mobile has various synthesizers, sampler, drum kits and FX effects using which you can create your own sounds from scratch.