RM551E CA Combinations

Good day everyone! May I request a copy of the supported band combinations of RM551E-GL? Thank you!

Dear @Rus
Sorry about this, we don’t have official document for it.
And I can’t share the document in forum directly. Please check with your provider firstly.

Thanks for your understanding.

As if any provider (leaving open which kind is actually meant - the one (re)selling the RM551E-GL module itself or an ISP?) would provide such profound detailed information. Often enough, they don’t even understand the inquiry and ask for the customer ID. :roll_eyes:

@silvia what’s the reason for all that secrecy fuss by the way in general? From lists of supported bands to firmware updates - it’s always that conspirative “mailing such stuff directly to users at best” but no public, simply accessible download area on the Quectel website.

Do we have to make lives make even harder for all of us? After all, your products - despite being great from a technical standpoint - aren’t exactly free from bugs or weird implementation decisions such as the impossibility now to set the generic MAC address for the bridge mode on the RM551E-GL.

Wouldn’t you actually benefit from a broader community which plays the unpaid alpha tester at the end of the day?

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My sentiments exactly. I was assuming that I could at least get some technical infos here since just like what you said, providers commonly doesn’t have even any idea about these inquiries, but even the manufacturer’s forum wouldn’t provide any help at all. I dont think that theres any sensitive data about CA combinations to begin with.

Yes, the whole communication habit of most mobile manufacturers is just plain awful which is quite ironic, given that their very field of expertise is supposed to be communications after all - one might naively think.

Anyway, out of experience, and of course I am bound to my very limited ISP-modem - combination, the RM551E-GL currently aggregates the bands B1+B3+B7+B8+n28+n78 in the case of O2 Germany which is not too bad. So at least also 2CA for 5G and probably that modem would be capable of lot more, the limiting factor most certainly being the provider here.

What is interesting is, that for even the 4CA LTE + 2CA 5G, a modem of the class RM521FGL or above seems to be necessary. A RG520F-EU for instance, as used by the a bit newer Mikrotik Chateau 5G R16, “only” aggregates 3CA LTE + 2CA 5G. The well-established, but outdated RG502Q-EA only achieved 4CA LTE + 1 5G for me.

You’re probably aware of the website for 4G/5G Bands & Combos, but it is neither complete nor very intuitive to use.

Yeah, the information politics on that is lousy at best and it is really beyond me why even professional companies such as Cisco, Teltonika, etc. don’t list any CA combinations but always the pure single band support in the same simple-minded way. Really annoying.

Guess I’m not the only one getting a bit cynical around here. The provider’s/manufacturer’s bad communication style seems to be pretty common knowledge. The (in)famous “security by obscurity” - attempt, as if that ever worked in history in the long run.

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