Hello: I need to decide quickly what to do, as I only have a couple of days to return the phone if I can't solve this. I am very happy with the phone as it suits all of my needs perfectly! I have an international SM-G903F Samsung Galaxy S5 Neo. I activated it on striaghttalk, and the phone functions perfectly, except I am only getting an H, or H+ signal. I did check all the specs before I purchased it, and it does support the proper bands for the carrier. I have read posts everywhere, called Straighttalk, tried a different sim card, played with APN settings till the cows came home, hard reset the phone, ect. If someone can help me solve this, I will pledge them my nextborn!