My problem: it is not compatible with my carrier's LTE (SaskTel). I only get H or H+ in the top-left corner of the screen, and about one quarter of the download speed as other phones. The RM-877 is meant for North-American markets, as I understand; it works with the 700/850/1700/1900 MHz bands, while the RM-875 works with the 2100/1800/2600/900/800 MHz bands. My carrier uses the 1700 and 2100 bands. I am wondering if the RM-875 can be made to work better with my carrier's LTE service by flashing it with a different ROM.