Some little technical blog

Monthly Archives: March 2017

Sierra Wireless EM7455: how to make it work with an older Lenovo laptop

Lenovo and other manufacturers, namely Dell are starting to use the newest Quallcomm 9×30 based cellular modems. The only modem manufacturer so far is Sierra Wireless and the model is XX7455, where XX is the form factor code. We’ll be using an m.2 modem, so our model number is EM7455. For the older generation laptops that only have a mini-PCI slot there’s the MC7455 model. Currently, the EM7455 is available as Sierra Wireless generic version (the model is EM7455), Lenovo version (the model is EM7455 as well), and Dell version (the model is DW5811e). All three versions are the same hardware, the only difference is the firmware and there are no restrictions for cross-flashing too.

EM7455 is not intended for use with the previous generation Lenovo laptops, such as X240, X1 Carbon Gen2, etc, but we’re going to fix that!

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