# Difference between versions of spitz x750 **URL:** \ **Category:** Router\ **Created:** [September 13, 2021, 4:19am UTC](https://forum.gl-inet.com/t/difference-between-versions-of-spitz-x750/17354 "2021-09-13T04:19:05Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![fingg](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/f/b9e5f3/32.png) [@fingg](https://forum.gl-inet.com/u/fingg)\ **Post date:** [September 13, 2021, 4:19am UTC](https://forum.gl-inet.com/t/difference-between-versions-of-spitz-x750/17354/1 "2021-09-13T04:19:06Z")
The speeds I’m getting from my first gen Spitz are disappointing. I’m on T-Mobile 4g with towers very close and only see barely over 20mbps regularly. I’m wondering if v2 of the same device will give me any better performance and what the main differences between the devices are. ---
**Author:** ![alzhao](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@alzhao](https://forum.gl-inet.com/u/alzhao)\ **Post date:** [September 13, 2021, 9:51am UTC](https://forum.gl-inet.com/t/difference-between-versions-of-spitz-x750/17354/2 "2021-09-13T09:51:17Z")
V2 optimized the antenna so hopefully it can achieve better speed. Did you try ncm protocol in the modem config? ---
**Author:** ![fingg](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/f/b9e5f3/32.png) [@fingg](https://forum.gl-inet.com/u/fingg)\ **Post date:** [September 13, 2021, 6:23pm UTC](https://forum.gl-inet.com/t/difference-between-versions-of-spitz-x750/17354/3 "2021-09-13T18:23:05Z")
Can you point me to a thread that best describes how to implement ncm protocol? ---
**Author:** ![alzhao](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/a/5f9b8f/32.png) [@alzhao](https://forum.gl-inet.com/u/alzhao)\ **Post date:** [September 14, 2021, 4:11am UTC](https://forum.gl-inet.com/t/difference-between-versions-of-spitz-x750/17354/4 "2021-09-14T04:11:15Z")
Sorry, I mean qcm, not ncm. You can refer to this post and find the images for optimal configuration > [@North American Carriers, ATT, Verizon, Cricket, T-Mobile Setup and Update 2021](https://forum.gl-inet.com/t/north-american-carriers-att-verizon-cricket-t-mobile-setup-and-update-2021/15902): > > This post is an update of Using GL.iNet 4G devices with North American carriers, especially in the USA. If you have problems connect to your 4G network using GL.iNet 4G devices, please refer to [Modem FAQ - GL.iNet Docs 3](https://docs.gl-inet.com/en/3/troubleshooting/modem_faq/) first. T-Mobile T-Mobile should be the easiest to work with. Generally all GL.iNet 4G devices can work with T-Mobile SIM card without any problems. If you have problems, try to change the settings as in troubleshooting here [Modem FAQ - GL.iNet Docs 3](https://docs.gl-inet.com/en/3/troubleshooting/modem_faq/). If cannot solved, you’d … ---
**Author:** ![bruce](https://forum-assets.gl-inet.com/user_avatar/forum.gl-inet.com/bruce/32/35649_2.png) [@bruce](https://forum.gl-inet.com/u/bruce)\ **Post date:** [October 29, 2025, 4:14am UTC](https://forum.gl-inet.com/t/difference-between-versions-of-spitz-x750/17354/5 "2025-10-29T04:14:53Z")