I think I could too, but it wouldn't be able to save the blobs. Then if I proceed to do a JB, and something goes wrong or I need to wipe my phone after the JB, I wouldn't be able to go back to 5.1.1 from what I've read.
Also, even though whoever is selling to me would most likely reset and wipe I like to do factory restore before the JB.
I think I could too, but it wouldn't be able to save the blobs. Then if I proceed to do a JB, and something goes wrong or I need to wipe my phone after the JB, I wouldn't be able to go back to 5.1.1 from what I've read.
Also, even though whoever is selling to me would most likely reset and wipe I like to do factory restore before the JB.