I have used Pepwave products for a long time, and am pretty good at testing things. I have had a ton of different Pepwave models, antennas, and providers.
I am having a problem with T-Mobile throughput with the MAX Transit LTE-A and LTE model. No matter what I do, I am limited at about 2Mbps up/down and most of the time much worse. I use very careful methodology, only changing one thing at a time, waiting for things to settle, not having anything else on the MAX or the network, and run at least 3 tests all at the same times.
I have also tested this on a MAX Transit LTE (non-A) model with the same results.
I have an AT&T SIM in the same unit, and depending on location and such, get 10Mbps down/up or higher regularly, so this is clearly a problem with T-Mobile only.
I am beginning to wonder if there is a problem with settings (MTU, etc.) or Pepwave firmware that is affecting performance.
I am running version 7.0.0 build 2742
My test machines are both connected via WiFi (2&5Ghz) and wired. The same result can be observed from all test machines whether they are wired or wifi. I use a Windows 10, OS X, and command line linux shell. I record the signal strength and other properties from the Pepwave, all very good levels, and then run tests from beta.speedtest.net on the Win10/OSX machines, and speediest-cli on the linux machine. Speed tests are run one at a time of course.
My signal strength (average) looks like this in the Pepwave:
Band: LTE Band 12 (700 MHz)
RSSI: -57dBmSNR: 0dBRSRP: -87dBmRSRQ: -15dB
Secondary Band: LTE Band 4 (AWS 1700/2100 MHz)
(Note that the above is using LTE-A)
The profile I am using for T-Mobile under Cellular settings is:
Network Selection: Auto
LTE/3G: Auto
Authentication: Auto
Data Roaming: Yes
Operator settings: Auto
APN: (auto populated) fast.t-mobile.com
Everything else is blank. Does something here need to be changed?
Here is the (extensive) list of things I have tested and tried - I am sure I have missed some of them:
TMO SIM in MAX Transit LTE-A with factory antennas - bad result
TMO SIM in MAX Transit LTE (non-A) with factory antennas - bad result
TMO SIM (same SIM) in an iPhone - whopping 20-40Mbps upload/download at same location
TMO SIM in MiFi device - 20-40Mbps upload/download at same location
TMO SIM in MiFi device, MAX Transit using WiFi as WAN to connect to it - 20Mbps up/down
AT&T SIM in MAX Transit LTE-A with factory antennas - 10Mbps up/down
TMO SIM in MAX Transit LTE-A with Wilson external antenna (single) - bad result
TMO SIM in MAX Transit LTE-A with dual Wilson external antennas - bad result
TMO SIM in MAX Transit LTE-A with 6 other varying antenna configurations from Tagolas, Panorama, SureCall, and more - bad result
TMO SIM at another location with all of the above, same test results
Observations:
WiFi vs wired clients do not differ, not an issue with that.
OSes of clients are different, not MTU craziness or something else on the clients.
TMO SIM works fine in other devices.
TMO SIM in another device, Peplink using WiFi as WAN, acceptable result.
AT&T SIM works fast in the Pepwave.
Location does not matter.
Antennas do not matter.
All this data says to me that there is a problem with the radio or settings on the Pepwave. The SIM, plan, tower, antenna, or Pepwave hardware (two different MAX units) isn’t faulty.
The SIM works perfectly in an iPhone & MiFi, and the Pepwave can even get the fast speeds if I use WiFi as WAN. Clearly something is set wrong on the Pepwave, or it is not handling T-Mobile correctly via the radio.
I have not varied the MTU much and am wondering if that could be it. I have tried the default, and 1492 which was suggested on a forum elsewhere.
I have been testing this for well over a month, any help would be appreciated.