Software update on carrier unlocked S24 Ultra

[JamesZ]

Hi there,

Recently I bought an used unlocked T-Mobile S24 Ultra and used it on Verizon network. It works perfectly on Verizon 5G UW network. 

My question is:

How can I get Android 15 update? It shows Android 14 now. All other softwares update are done except Android 15.

Thanks 

[LongHiker · Accepted solution]

@JamesZ Probably your carrier unlocked device has T-Mobile firmware installed. With a Verizon SIM installed, the update check looks at the Verizon update servers. It will never find a T-Mobile firmware update.

One solution is to temporarily install a T-Mobile SIM, whether it has service or not. Your phone will read the update servers from the SIM card. Before you put your Verizon SIM back in, connect to Wifi and download the update. 

The other solution is to flash the Verizon firmware onto your phone. 

[JamesZ]

🙏