However, there are also some downsides to LTE support on a smartwatch. First, it can be expensive. Most carriers charge an additional monthly fee for LTE service on a smartwatch, and it can add up over time. Additionally, using LTE on a smartwatch can drain the battery quickly. If you’re using LTE to stream music or make calls on a regular In response to sheplfc74. 16-08-2021 08:10 PM - last edited ‎16-08-2021 08:13 PM. If you go for the 4g, either way you will still be able to use it Bluetooth only. If you ever want to go the 4g route, you can. Plus if you can trade in the active 2 watch for the watch 4 4g, your getting a £150 off the price. 1 Like. In 2009, LG Electronics created the Watch Phone to function over 3G cellular. LG's device had a camera and 1.4-in. display, which could be used for voice and video calls. it's worth pondering That why i’m considering about the LTE version. I don't think it is worth it until the battery performs better. Unless you want the SS model, then that is your only option for series 3. For most people, the hit to the battery isn't worth it - you can get 1 hour of talk time on a full battery - then your watch is dead. nUgdJ.