# X750 Spitz is there a way to lock to band? **URL:** \ **Category:** Router\ **Created:** [January 12, 2019, 5:58am UTC](https://forum.gl-inet.com/t/x750-spitz-is-there-a-way-to-lock-to-band/5687 "2019-01-12T05:58:28Z")\ **Posts on this page:** 1\ **Showing post:** 9
**Author:** ![dwoslc90](https://forum-assets.gl-inet.com/letter_avatar_proxy/v4/letter/d/c68b51/32.png) [@dwoslc90](https://forum.gl-inet.com/u/dwoslc90)\ **Post date:** [January 20, 2019, 6:46am UTC](https://forum.gl-inet.com/t/x750-spitz-is-there-a-way-to-lock-to-band/5687/9 "2019-01-20T06:46:45Z")
Ok, I figured out a bunch of things. I was originally receiving horrible speeds for T-Mobile (circa 0.7Mbps download) by simply plugging in the device. Meanwhile, my MoFi4500 and iPhone X Qualcomm were both achieving 5-6Mbps. I noticed that the X750 Spitz kept connecting to Band 12. I suspect it kept connecting to Band 12 because it had the stronger signal. To achieve higher speeds, I needed to switch away from Band 12. Typically, 700MHz Band 12 will be more congested because it only has 5MHz of bandwidth available for a wider area. 700MHz penetrates well into buildings, or elevators, but if you’re antennas are right next to a window, it’s unlikely to help. I needed to switch to a higher MHz band, such as LTE Band 4 (1700/2100 MHz aka AWS bands) or LTE Band 2 (1900 MHz). T-Mobile operates these two bands with more bandwidth, 20MHz and 10MHz depending on the geographical market. **To change LTE Bands use the following AT Commands** | **Bands** | **AT Commands** | **Notes** | | --- | --- | --- | | 2 | `AT+QCFG="band",0,2,1` | | | 4 | `AT+QCFG="band",0,8,1` | | | 5 | `AT+QCFG="band",0,10,1` | | | 2+4 | `AT+QCFG="band",0,a,1` | This will likely be the fastest for urban environments | | 2+4+5 | `AT+QCFG="band",0,1a,1` | | | 12 | `AT+QCFG="band",0,800,1` | | | 2+4+12 | `AT+QCFG="band",0,80a,1` | | | 2+4+5+12 | `AT+QCFG="band",0,81a,1` | This covers all T-Mobile bands | | 2+12 | `AT+QCFG="band",0,802,1` | | | 4+12 | `AT+QCFG="band",0,808,1` | | | 5+12 | `AT+QCFG="band",0,810,1` | This will be best for rural deployments as 850MHz Band 5, and 700MHz Band 12 will reach the farthest distance | | Reset to Default (All Bands) | `AT+QCFG="band",0,2000000003300185a,1` | | These changes are immediate, and the EP06-A modem will switch without requiring a reset or reboot. You will have to wait 5-10 seconds for the switch over to occur. You should notice the LEDs turn off when the command is issued. By changing away from Band 12, I was able to achieve significantly better speeds and ping to `8.8.8.8`. Normally in urban environments I’d set my bands to `2+4` to achieve the fastest speeds. But you will have to monitor your ping, speedtest and LTE band throughout the day in order to switch to the fastest band. This is why I would recommend against looking at signal strength (with command `AT+CSQ`) since your speed and latency will depend on how congested the tower is, instead of how strong the signal is. FYI T-Mobile has limited deployment of LTE Band 5. I’ve yet to figure out if you can bandlock for Carrier Aggregation (CA). Though in my case, since T-Mobile typically CAs with Band 12, I wouldn’t want to allow Spits to touch that band. **To fetch the current band** `AT+QNWINFO` This will return `LTE BAND 2`, or whichever band you’re connected to. **Set EP06 Modem LTE only** `AT+QCFG="nwscanmode",3,1` You can change the above command’s param value `3` to `0` for `AUTO`, or `2` for `WCDMA only` or `3` for `LTE only`. I would recommend leaving it at `LTE only`. **Set your TTL to 64 to avoid hotspot bandwidth allocation** If you’re on one of T-Mobile’s unlimited data plans, such as T-Mobile One, then you will want to prevent T-Mobile from restricting your tethering speed by setting your time-to-live (TTL) to 64. Go to Spits Panel \> Advance \> log into Luci \> Network tab \> Firewall \> Custom \> and Add `iptables -t mangle -I POSTROUTING 1 -j TTL --ttl-set 64` to the beginning of the script \> click the Restart button. **Suggestions to the Gl.inet team** - Provide an easy way to issue `AT+QNWINFO` - Provide an easy way to change to a specific set of bands via a checkbox similar to MoFi’s interface. - Provide an easy way through the dropdown to set the `nwscanmode`. - Is there a way to automate picking bands with a script? If you can point me to the right direction, I’ll write one myself. I’m unsure if openwrt has a crontab to run a script at a regular interval. I’m unsure how to issue `AT` commands through the command line. And I’m unsure if there’s a way to run a script when the modem boots up and connects or reconnects. --- _[View the full topic](https://forum.gl-inet.com/t/x750-spitz-is-there-a-way-to-lock-to-band/5687)._