I miss my windows phone terribly. Im on sprint now, do i have ANY options?

I switched from at&t to sprint about a year and a half ago. I made the switch only to get unlimited data again, which i definitely required as i was going over on a regular basis with at&t. I hated to give up my lumia 1520, but the note 4 and unlimited data was just a better option as far as financial reasons. Well, fast forward now, and although i don't hate my note, its just not a windows phone. I miss my windows phone something awful. Ive tried to search and search and I've found no concrete answers on what phones will and won't work with sprint. I know I'm not fortunate enough to get a new 950 or anything obviously, i just hope something is compatible other than the 635. If anyone knows of any other windows phone that will work and sprint will activate for me if its unlocked, please let me know. Thanks so much