Welcome to the community!
You can view the acceptable documents here. Note you will need two documents from that list.
The S10+ is a great phone! Are you planning on purchasing the phone outright or are you hoping to subsidise the device with a monthly plan? If your visa is only for 1 year, I'm not sure you'll be able to subsidise the phone because all contracts are for a 2 year period.
Hope this helps 😀