# ES 450 with T-Mobile **URL:** \ **Category:** AirLink Routers\ **Created:** [October 4, 2018, 9:23pm UTC](https://forum.sierrawireless.com/t/es-450-with-t-mobile/14055 "2018-10-04T21:23:09Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![jaythayer](https://avatars.discourse-cdn.com/v4/letter/j/5fc32e/32.png) [@jaythayer](https://forum.sierrawireless.com/u/jaythayer)\ **Post date:** [October 4, 2018, 9:23pm UTC](https://forum.sierrawireless.com/t/es-450-with-t-mobile/14055/1 "2018-10-04T21:23:09Z")
I have an ES450 that I purchased from AT&T. It works OK now. I would like to switch my service to T-Mobile. I have downloaded the ES450 Radio Module Firmware for Generic Operators North America that I can load into the ES450. Is there any experience using the ES450 with T-Mobile? Good idea? Bad idea? ---
**Author:** ![pek](https://avatars.discourse-cdn.com/v4/letter/p/df705f/32.png) [@pek](https://forum.sierrawireless.com/u/pek)\ **Post date:** [October 8, 2018, 7:25pm UTC](https://forum.sierrawireless.com/t/es-450-with-t-mobile/14055/2 "2018-10-08T19:25:09Z")
I have no direct experience with it on TMo, but it is certified by Sierra to work with TMo. It should be able to connect to T-Mobile’s Band 2 or 4 LTE, however it will not support T-Mobile’s lower frequency LTE bands (12 or 71). ---
**Author:** ![dkelly](https://avatars.discourse-cdn.com/v4/letter/d/b77776/32.png) [@dkelly](https://forum.sierrawireless.com/u/dkelly)\ **Post date:** [October 30, 2020, 1:20am UTC](https://forum.sierrawireless.com/t/es-450-with-t-mobile/14055/3 "2020-10-30T01:20:32Z")
I have one on T-Mobile. I just updated to the latest generic radio firmware (there is none specific to T-Mobile on the download page). I have consistently low download speeds of .6 Mbps. The upload speed is good at around 25-30 Mbps. It has always been this way for the ES450 on T-Mobile. I suspect a hardware issue somewhere. The RSRP is good and RSRQ/SINR is also good.