Carriers like T-Mobile and Vodafone are pushing "hotfixes" through the framework to address 5G SA handover issues. These updates do not change the Android version but modify the modem’s NR (New Radio) parameters.
If you are looking for specific patent filings or code references related to this, you may find relevant documentation under the following search terms: zte terminal software update framework hot
On carrier-locked ZTE devices (e.g., AT&T, Bell Canada), the framework checks the carrier’s IMSI whitelist before allowing a hot update. Carriers like T-Mobile and Vodafone are pushing "hotfixes"