I finally got rid of T227 (T-Mobile - between that my Note 10+5g which but for the grace and help of Sr member Afaneh92, I would have tossed) I learned a lesson from my experiment purchasing phones from carriers. So, I purchased this:View attachment 5915169
The topic of this thread is the existence, or not, of other possible ROMs for it. This device is supposed to be not only cellular for data, but is supposed to make and receive phone, text, etc.Initially, because T-Mobile actually owed me a refund, I figured I'd keep their SIM, plug it in and no worries even though I knew the SIM was for data only. So, I was not surprised when the phone did not work and when it eventually caused the issue described below.
As a background, once you get the hang of patching etc, Magisk/rooting is a breeze...just get the official firmware and patch the whole AP file - I do it in the device itself.. it takes longer but it is within my ability! I was even able to download the updated firmware last week get root. fact, at the risk of heaping off-topic praise on the developers of Magisk/LSPosed, the result is a device that is easy to adjust with exponentially more stable functionality! It's given my old galaxy note 10+ 5G another year or two of life! No vbmeta or apparent issues.
My last TWRP experience taught me my limits and how complex it is becoming to develop a recovery for Samsung devices. I love TWRP but I am not a developer. I can clean the cache, do reasonably ok image backups overcome whatever barriers I need for my simple issues.
Back on topic, I need a ROM because no matter what LTE SIM I use (all are rated or approved for this device), the same result: after setting up the device from a clean wipe and reset, all is well. SIM is recognized and functional, wifi works and everything is great. I even have my own phone number assigned for calls and messages - specifically. The problem begins if I step one inch beyond using the LTE as just a provider of data in a passive way, to anything "active" i. e., attempting to send a text or, god forbid, making a phone call. Within seconds after either of those activities, the SIM "dissappears" and when attempting anything requiring LTE, the message is always that I need to install a SIM. I have read hundreds of pages and the suggestions are all the same. Once the SIM is no longer recognized, no amount of fiddling with the SIM, replacing it with a different SIM, cleaning the data from the appropriate drivers, will do anything. The Tablet has to be wiped and factory reset again in order to get the it to recognize the SIM again. My reading does not reveal anyone else reporting this kind of pattern - more worryingly, there is never a conclusion one way or another regarding the general complaint of a SIM not being recognized. Samsung INSISTS that an unlocked world tablet like this can become your new phone! The phone application is part of the device's OS!
With no precedent or guidance that I can find, I have been reduced to hoping that a different ROM would somehow enable the device to do what Samsung swears it can do. I am pretty much hoping for a ROM or a miracle!