Diego, the different framerates are possibly because your phone, like the iPhone, uses a variable framerate. Video editors don’t generally like variable framerates.
However I’ve used variable framerate iPhone shots in MS Platinum 12 without problems. But I rendered them to another file using the XDCAM EX HQ template and Disabled Resampling in the clip’s Switches. This enabled me to obtain smoother preview and also check the mov files were rendered okay.