Here's why. I believe global is the correct option. As carriers build out 5G networks, they’re decommissioning their 2G and 3G infrastructure. Then, after using HTC's Connection Setup, the "Roaming Service" seemed to stop. No need to restart. Sprint's network does not transmit voice over LTE. LTE (Long Term Evolution) is a 4G communication standard designed to be 10x faster than standard 3G. It is a popular wireless technology to determine the cellular network protocol implemented in mobile phones, which is shared by eighty percent of the global market. LTE (), GSM (3G & 2G), CDMA (3G & 2G), 5G and ISM.The fundamental differences between these four modern technologies is the way they transmit and receive information. Different carriers have different timelines for this, but Verizon is taking concrete steps to begin transitioning CDMA devices off of the network at the end of 2019 — eventually moving all devices to the HD Voice LTE network. It seems like there is no clear difference between the three. After a few days I have to cycle airplane mode and or reboot the phone to get text messages to go out. If its set to GLOBAL it has every radio in the phone on, I think theres 5 in total but if its set to LTE/CDMA it will only have 2 on at a time LTE/1x or if no LTE … Sprint has not yet completed the build out of their new LTE network and there are some growing pains. The CDMA/GSM split ended, in theory, as carriers all switched to LTE, a single, global 4G standard, starting in 2010. Spectrum and radio technology. If you select WCDMA only, your mobile phone can only connect to 3G … Yes, I'd use LTE mode instead of Global. With 2G technology, you had basically four radio bands to support data and voice. For 3G, there were 4 data bands, plus additional bands in the Americas and Japan. So the CDMA vs. GSM discussion is really a 3G discussion. The global system for mobile communication is abbreviated as GSM. BUT If you're on Global, it does this automatically, so just keep it on Global. If you select LTE/GSM/WCDMA (Auto mode), your mobile phone automatically switches between the two network modes provided you're within range of a 3G or 4G network. I may be wrong but, I believe in the US there is no difference, you're using LTE/CDMA, but when you travel out of country you may need GSM/UMTS. But the difference remained because phones still needed to … However, it faces a major problem… spectrum. If you lose signal completely It will automatically go back to global sometimes. One of the problems is with circuit fallback. If you select GSM only, you can't achieve high data speeds. In terms of their relevance to 3G and 4G LTE network bands and frequencies, the thing to know is that CDMA and GSM only use 3G technology—LTE is its own network entirely (and there are different LTE bands by country). 3G (UMTS) or 4G (LTE) enables you to achieve higher data speeds than when using 2G (GSM). I was checking different things and noticed network signal strength is much better than normal (95-97 dbm, usually it used to be 103dbm at the same place), checked network mode and it is set as Global instead of LTE/CDMA, I remember it was LTE/CDMA before reboot and my signal was 103dbm. I have a Verizon 8X and have had "Roaming Service" issues. Correct Answer: trying to find the truth for better signal; one says global other says cdma lte on mobile setting Difference Between GSM vs LTE. Once all is said and done, there will be one global LTE based network. I tried switching the network mode from global to LTE and CDMA. However, I leave my Nexus 5 in 3G mode until I need LTE. So, thinking it was safe to switch back to global mode, I got "Roaming Service" again. The future of CDMA vs. GSM. One rep says keep it on global, the next rep says use lte/cdma.