Sorry, due to SN's length limit on the title, I had to cut off part of the actual title:
Bitcoin wallet / PSBT signing app for Mediatek MRE RTOS (e.g. Nokia Series 30+)
So MRE refers to Mediatek MRE real time operating system (RTOS), with MRE being the acronym for MAUI Runtime Environment.
Many S30+ devices only support MAUI Runtime Environment (MRE), developed by MediaTek, but some later devices have included support for J2ME applications.
Sorry, due to SN's length limit on the title, I had to cut off part of the actual title:
Bitcoin wallet / PSBT signing app for Mediatek MRE RTOS (e.g. Nokia Series 30+)
So MRE refers to Mediatek MRE real time operating system (RTOS), with MRE being the acronym for MAUI Runtime Environment.
https://en.wikipedia.org/wiki/Series_30%2B
https://answers.microsoft.com/en-us/mobiledevices/forum/all/nokia-s30-development-signing-support-in-mre/25c9ad93-644d-4543-9c0d-f539aad27c59