[{"data":1,"prerenderedAt":127},["ShallowReactive",2],{"developer-note-lte-cat-1-bis-nrf93m1":3},{"id":4,"title":5,"author":6,"body":7,"date":118,"description":119,"extension":120,"meta":121,"navigation":122,"path":123,"seo":124,"stem":125,"__hash__":126},"developerNotes\u002Fdevelopers\u002Fnotes\u002Flte-cat-1-bis-nrf93m1.md","LTE Cat 1 bis vs LTE-M \u002F NB-IoT","Jordan Yates",{"type":8,"value":9,"toc":114},"minimark",[10,21,24,27,38,105],[11,12,13],"p",{},[14,15],"img",{"alt":16,"className":17,"src":19,"width":20},"Nordic nRF93M1 development kit",[18],"rounded-lg","\u002Fimages\u002Fnotes\u002F20260911-lte-cat-1-bis.png",1200,[11,22,23],{},"LTE Cat M1 \u002F LTE-M \u002F NB-IoT were designed for ultra-low power, low data, long-range communications — pretty much the sweet spot where Infuse-SDK offers the greatest value. That said, over the past year we have encountered a number of countries and operators around the world that do not support these, which makes it a challenging choice for global IoT solutions.",[11,25,26],{},"Recently we have been looking towards LTE Cat 1 bis, which works across standard LTE networks worldwide and still achieves low-power operation at a low cost. It does have less range than LTE-M \u002F NB-IoT, but it also has a lot more bandwidth allocated by network operators. That matters for even slightly higher throughput devices: it allows more devices per cell tower — a limitation we ran into with LTE-M devices deployed at scale in the same area \u002F same tower coverage.",[11,28,29,30,37],{},"In updating Infuse-SDK to support Cat 1 bis as an out-of-the-box low-power comms layer, we have been improving support for Nordic Semiconductor’s ",[31,32,36],"a",{"href":33,"rel":34},"https:\u002F\u002Fwww.nordicsemi.com\u002FProducts\u002FnRF93M1",[35],"nofollow","nRF93M1"," Cat 1 bis modem in upstream Zephyr. Some of the fixes we have pushed:",[39,40,41,49,56,63,70,77,91,98],"ul",{},[42,43,44],"li",{},[31,45,48],{"href":46,"rel":47},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpull\u002F116992",[35],"Fix large networking packets being dropped",[42,50,51],{},[31,52,55],{"href":53,"rel":54},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpull\u002F117104",[35],"Fix power cycling of the modem",[42,57,58],{},[31,59,62],{"href":60,"rel":61},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpull\u002F113916",[35],"Fix modem failing to boot",[42,64,65],{},[31,66,69],{"href":67,"rel":68},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpull\u002F115610",[35],"Support the latest DK version",[42,71,72],{},[31,73,76],{"href":74,"rel":75},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpull\u002F112861",[35],"Output standard cellular modem events",[42,78,79,84,85,90],{},[31,80,83],{"href":81,"rel":82},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpull\u002F115693",[35],"Reduce memory usage"," (",[31,86,89],{"href":87,"rel":88},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpull\u002F113915",[35],"follow-up",")",[42,92,93],{},[31,94,97],{"href":95,"rel":96},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpull\u002F114033",[35],"More efficient UART communications",[42,99,100],{},[31,101,104],{"href":102,"rel":103},"https:\u002F\u002Fgithub.com\u002Fzephyrproject-rtos\u002Fzephyr\u002Fpulls?q=is%3Apr+author%3Ajordanyates+created%3A%3E2026-05-01+modem+",[35],"And more",[11,106,107,108,113],{},"Nordic’s nRF93M1 development kits are now available through electronics suppliers. Creating a commercial low-power IoT solution using Cat 1 bis has never been easier with ",[31,109,112],{"href":110,"rel":111},"https:\u002F\u002Fgithub.com\u002FEmbeint\u002Finfuse-sdk",[35],"Infuse-SDK",".",{"title":115,"searchDepth":116,"depth":116,"links":117},"",2,[],"2026-09-11","Infuse-SDK adds Cat 1 bis as an out-of-the-box comms layer, with nRF93M1 work upstream in Zephyr.","md",{},true,"\u002Fdevelopers\u002Fnotes\u002Flte-cat-1-bis-nrf93m1",{"title":5,"description":119},"developers\u002Fnotes\u002Flte-cat-1-bis-nrf93m1","ajAcTSHr0BVNlcEGX_hg47gV2MHoM1akE2HJO4L9oWI",1790559262293]