Multimedia mobile phones increasingly support playing videos of greater size and quality, so nothing prevents you from converting all the videos you want to 3GP format of mobile phones.
For this you only need a tool like Allok Video to 3GP Converter, which allows you to transfer a wide catalog of videos from your computer to your mobile phone. Some of these video formats are: AVI, WMV, DivX, XviD, MPG, MPEG, MP4, M4V, FLV, 3GP, ASF, RM, RMVB, MOV, MOD, ASX, MKV, OGM, SVCD, VCD, VOB, etc.
When converting, Allok Video to 3GP Converter allows you to define the resolution of the resulting 3GP video (lower resolution, smaller size, but also worse quality).
NOTE: For the correct operation of Allok Video to 3GP Converter you need to have DirectX 8.1 or higher installed beforehand.
You can free download Allok Video to 3GP Converter 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.