We highly recommend setting your bandlock appropriately and if you do not know the best bands, we'd recommend setting it to LTE only. See AT commands below.

To change LTE Bands use the following AT Commands

BandsAT CommandsNotes
2AT+QCFG="band",0,2,1High Frequency band
4AT+QCFG="band",0,8,1High Frequency band
5AT+QCFG="band",0,10,1Typically a voice band with lower bandwidth
2+4AT+QCFG="band",0,a,1This will likely be the fastest for urban environments
12AT+QCFG="band",0,800,1Typically a voice band with lower bandwidth
2+4+5+12AT+QCFG="band",0,81a,1This covers all T-Mobile and AT&T bands
5+12AT+QCFG="band",0,810,1This 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.

To fetch the current band

This will return LTE BAND 2, or whichever band you’re connected to.

Set EP06 Modem LTE only

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 Pink Basic or Pink Max, 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.