So, a little back story on this S4. I have had this phone since it was brand new, it is now unlocked, still works as well as it can in 2019, it always has the issuee of saying "no SIM card" and only working in 3G connectivity. Replaced the SIM/SD card reader and it would sometime work in 4g LTE but mostly would still say no sim... However it does still work great as a universal remote, which is why I keep it around and charged (lost my tv remote when we moved lol)