@MikaKpk Granted, those also exist, but there are like Huawei & ZTE "LTE CPE" devices that do the same.

• Try that search term...

Even #AldiTalk in #Germany sells those for like €100 with a free Data-only SIM but they don't seem to have #NetLock / #SimLock and you xan,just ditch the included SIM fir your own...

• Those too also have an analog POTS/PSTN port.

If you need more than one SIM / Line connected over #4G / #LTE then you propably need to buy one of those bigger boxes or DIY something with #Asterisk and some 4G FXO cards...

@MikaKpk Well, #FritzBox supoorts call routing and if you din't have one, they are cheap af used…

• Cheap #VoLTE routers will spit you out an RJ-11 jack you can hookup to the #FritzBox's #DSL port whilst having it not act as #Modem.

• Better #VoLTE boxes, often called "#GoIP" or "#GSMoverIP" literally run an #Asterisk server on them, some even can do Multi-SIM & call routing themselves or just expose each SIM as a SIP connection to link a #VoIP phone / #PBX to.

You'll find a crapton of those on Aperzon, eNay & ShitExpress!

• The Tenda 4G06 is just the cheapest I could find with an actual brand name attached to it…

Most people ain't aware of the search terms for a "#FixedWirelessTerminal"…

• Personally, I did use such boxes to migrate seniors from landline to #GSM & #LTE whilst letting them keep their (accessible, hearing-aid compatible) desktop handset.

@MikaKpk So basically you DIY one if those cheap "#GSMoverIP" boxes?

• Cuz yeah those exist, incl. #4G / #LTE variants and #FiitzBox cersions that support #ADSL|2 Annex B should be able to use that analog phone line part as well.

Unless you need like #ISDN and other features, something like a Tenda 4G06 is likely gonna work fine...