No point going to a Samsung repair centre because if you've rooted the device (as I had) and can't reboot to run TriangleAway, then it means your warranty is invalidated (I called them to check this beforehand).
Re the earlier comment... step 1) buy a PC, step 2) enjoy... as I mentioned, we only have Macs at work and I had a phone that wasn't working properly so it couldn't wait 'til I got home (to my PC)!
Re the earlier comment... step 1) buy a PC, step 2) enjoy... as I mentioned, we only have Macs at work and I had a phone that wasn't working properly so it couldn't wait 'til I got home (to my PC)!