# EM7565 Connection Speeds
**URL:** https://forum.sierrawireless.com/t/em7565-connection-speeds/35636
**Category:** MC/EM Series
**Created:** [November 25, 2025, 7:20pm UTC](https://forum.sierrawireless.com/t/em7565-connection-speeds/35636 "2025-11-25T19:20:00Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@jacob.shade](https://forum.sierrawireless.com/u/jacob.shade)
#### Post date: [November 25, 2025, 7:20pm UTC](https://forum.sierrawireless.com/t/em7565-connection-speeds/35636/1 "2025-11-25T19:20:00Z")
Hi,
I am using an EM7565 module connected to a board running ubuntu 24.04 with kernel 6.8.0-87. Iām using a T-Mobile SIM card. I am able to connect the modem to Network Manager using the following two commands.
`nmcli con add type gsm ifname /dev/ttyUSB2 con-name lte-modem apn fast.t-mobile.com connection.autoconnect yes connection.autoconnect-retries 0`
`sudo nmcli con up lte-modem`
When I go to [speedtest.net](http://speedtest.net) and run a speed test, I am only able to get ~25 Mbps Download/~30 Mbps Upload speeds. I also have a ublox LARA-L6 CAT4 module that I ran speed tests on and I was able to get ~60Mbps Download/30 Mbps Upload from the same location in my office.
I have updated to the latest Firmware Generic SWI9X50C\_01.14.22.00: [https://source.sierrawireless.com/resources/airprime/minicard/75xx/em\_mc75xx-approved-fw-packages/#sthash.Kf0SkdgE.foIJ5TAh.dpbs](https://source.sierrawireless.com/resources/airprime/minicard/75xx/em_mc75xx-approved-fw-packages/#sthash.Kf0SkdgE.foIJ5TAh.dpbs)
using the SDK and Drivers for EM7565: [Mobile Broadband Package for Linux (SDK, Drivers, Documentation)](https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/#sthash.BRMcCgd3.dpbs)
Why is this happening when the EM7565 has CAT12 capabilities? I would expect this to perform at the same speed or higher speeds compared to the ublox cat4 module. I am using the same antenna. The only difference is that the EM7565 requires an adapter cable to go from IPEX to SMA. With the board the ublox module is on, I can screw in the antenna directly to SMA ports. The connector cable has a 50 Ohm Impedance, which is what the specifications recommend.
Antenna Used:
> **[AEMF1005X-H | DigiKey Electronics](https://www.digikey.com/en/products/detail/abracon-llc/AEMF1005X-H/21650054?curr=usd&utm_campaign=buynow&utm_medium=aggregator&utm_source=octopart)**
>
> Order today, ships today. AEMF1005X-H ā RF ANTENNA 5G, LTE-M, Cat M, Cat M1, NB-IoT, IOT, CBRS Whip, Tilt RP-SMA Male, SMA Male Connector Mount from Abracon LLC. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
Cable Used:
> **[CAB556RF-0200-A-1 | DigiKey Electronics](https://www.digikey.com/en/products/detail/gct/CAB556RF-0200-A-1/18801107?s=N4IgTCBcDaIMIEEBCBWFA2ASgMQLQAYx99cFcBGEAXQF8g)**
>
> Order today, ships today. CAB556RF-0200-A-1 ā Cable Assembly Coaxial I-PEX MHF4L to SMA 1.13mm OD Coaxial Cable 7.874" (200.00mm) from GCT. Pricing and Availability on millions of electronic components from Digi-Key Electronics.
Thanks for any help anyone can offer š
Jacob
---
### Author:  [@jacob.shade](https://forum.sierrawireless.com/u/jacob.shade)
#### Post date: [November 25, 2025, 8:35pm UTC](https://forum.sierrawireless.com/t/em7565-connection-speeds/35636/2 "2025-11-25T20:35:47Z")
> [@jacob.shade](#):
>
> I am using an EM7565 module connected to a board running ubuntu 24.04 with kernel 6.8.0-87. Iām using a T-Mobile SIM card. I am able to connect the modem to Network Manager using the following two commands.
>
> `nmcli con add type gsm ifname /dev/ttyUSB2 con-name lte-modem apn fast.t-mobile.com connection.autoconnect yes connection.autoconnect-retries 0`
> `sudo nmcli con up lte-modem`
>
> When I go to [speedtest.net](http://speedtest.net) and run a speed test, I am only able to get ~25 Mbps Download/~30 Mbps Upload speeds. I also have a ublox LARA-L6 CAT4 module that I ran speed tests on and I was able to get ~60Mbps Download/30 Mbps Upload from the same location in my office.
>
> I have updated to the latest Firmware Generic SWI9X50C\_01.14.22.00: [https://source.sierrawireless.com/resources/airprime/minicard/75xx/em\_mc75xx-approved-fw-packages/#sthash.Kf0SkdgE.foIJ5TAh.dpbs](https://source.sierrawireless.com/resources/airprime/minicard/75xx/em_mc75xx-approved-fw-packages/#sthash.Kf0SkdgE.foIJ5TAh.dpbs)
> using the SDK and Drivers for EM7565: [Mobile Broadband Package for Linux (SDK, Drivers, Documentation)](https://source.sierrawireless.com/resources/airprime/software/mbpl/mbpl-software-latest/#sthash.BRMcCgd3.dpbs)
>
> Why is this happening when the EM7565 has CAT12 capabilities? I would expect this to perform at the same speed or higher speeds compared to the ublox cat4 module. I am using the same antenna. The only difference is that the EM7565 requires an adapter cable to go from IPEX to SMA. With the board the ublox module is on, I can screw in the antenna directly to SMA ports. The connector cable has a 50 Ohm Impedance, which is what the specifications recommend.
After trying out the SWI9X50C\_01.14.02.00 Firmware with T-mobile this greatly improved download speeds to 90 Mbps. Why is the Generic Firmware not as performant? If possible I would like for the device to work well with any SIM that is paired with it.
It is my understanding that the BUILD\_ID of the Firmware Images must match up with the PRI Image BUILD\_ID. So if I use the Generic SWI9X50C\_01.14.02.00 Firmware Image and have 01.14.02.00\_TMO, 01.14.02.00\_ATT, 01.14.02.00\_GENERIC, and 01.14.02.00\_ROGERS PRI Images, then I would be able to put any of those 4 cell carriers SIM cards in and it connect with good speeds right? Would I be limited to those 4 carriers unless I flashed new firmware/changed the active FW Image?
---
### Author:  [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)
#### Post date: [November 26, 2025, 12:13am UTC](https://forum.sierrawireless.com/t/em7565-connection-speeds/35636/3 "2025-11-26T00:13:52Z")
If TMO sim card is used, probably you need to use the TMO certified firmware
To see what PRI and firmware have been downloaded to module, you can check at!image?