purchased the Spitz GL-X750 hoping to get better wireless data performance since it is equipped with the Quectel EP06-A LTE Cat6 Modem (supports LTE-A carrier aggregation).
validated test results shows not to be working. here is the info of the test setup.
tested on firmware=3.004 & 3.012
Carrier = T-Mobile
equipment setup side by side
LG V30 (LH932) CA 2X2 band getting 60MB
MOFI 4500 SIM4 CA 2X2 getting 57MB
SPITZ GL-X750 (EP06-A modem) NO CA getting 29MB
GL-MIFI (EC25-A modem) CA not supported) getting 25 MB
NOTE: the SPITZ is showing same ~ download speeds as the GL-MIFI which does not have the CA capabilities.
Have anyone with a GL-X750 been able to get it working in a Carrier aggregation environment? really need to know if this investment is a total lost since I already had the MIFI unit.
Might be - modem is capable perhaps - for the US device, if it’s PTCRB and FCC, most carriers should have a default profile for the LTE Caps at a minimum - ATT and VZW do have innovation programs for startups to get deep certifications - Sprint is odd, speaking from experience, they’re cautious - T-Mobile is a bit more aggressive, but odd bands…
For roaming, they will all likely have a default profile for the modem… and a default for the SIM card based on the roaming agreement with the home provider.
FWIW - for a device manufacturer - the QCOM based wireless WAN cards are the shortest and least painful path for WAN modems - it’s a trust issue with the CPE Lab Managers, who are the ones that approve devices.
I’ll second the suspicion that T-mobile does not have CA enabled everywhere. I just rolled out roughly 20 X750s throughout the US and some do carrier aggregation while others do not. When CA is working, I get a response like this to AT+QCAINFO:
+QCAINFO: "pss",650,50,"LTE BAND 2",1,481,-103,-4,-81,16
+QCAINFO: "sss",5035,25,"LTE BAND 12",1,120,-90,-8,-72,0
Otherwise I just get an OK response
In North Carolina, for example, I have a device getting CA with bands 12 and 2. Performance is excellent.
But in Arizona, I have a device flipping back and forth between band 12 and band 4. The band 12 signal strength is higher, but the speeds are woefully slow (0-20 kbps). I locked to band 12 and couldn’t sustain a connection long enough to login via ssh.
So now I’m faced with the decision of whether to disable band 12, since CA is not being applied consistently across the network. It creates a bad experience in places where CA isn’t available but multiple bands are, with Band 12 often getting selected despite poorer performance due to its better CSQ. Is there a way to only enable band 12 as the secondary “sss” band?
Carrier aggregation requires the tower to be equipped, and it requires enough of a signal from two bands to aggregate anything. And sometimes, it still doesn’t like to do it. So CA doesn’t really kick in if you’re in wooded areas, or with weak signals.
Use CellMapper to help crowd source which bands are on which towers, and where the towers are, and which ones are LTE-A enabled (carrier agg/5Ge).
Remember, the tower locations for crowd sourced information are not accurate until they get a lot of different data points from all around the tower. You can make an account and drop a pin if you know where they are.
And yes, my Mikrotik SXT with a Cat 4 modem can smoke a Nighthawk M1100 due to carrier agg never coming into the equation. It depends on the tower and the geography between you and that tower, and interference from other towers.