Samsung Galaxy S21 Ultra 5G

In good condition black s21 ultra unlocked dual sim nano + nano or nano + e-sim can only use a combo of two sims at a time, tho I've never used the e-sim, but it shows as a option, I am able to use boost infinite which runs on AT&T in my area, I have also used on T-Mobile and several of the carriers MVNOs and on Visible and US Mobile which are Verizon MVNOs, tho I have never seen 5G connected on this device even tho it supposedly has some of the bands, I was told this is normal by the importer I purchased it from, and I usually keep it disabled any way for battery reasons.