For those considering buying one of these in the UK and taking it to Turkey here's what what some poor sod had to say on the TL forum
"Hi, I originally read all the posts on various ways of accessing the internet and eventually decided to buy a MiFi in the UK as some insisted it was the best option. I parted with my £70 and bought a sim free HUAWEI E556. Arrived in Turkey 24th May, hotfooted down to the Turkcell shop where I was advised my European MiFi would not work in Turkey but I insisted it would because I had been told on this forum it would, so he reluctently sold me a sim card for 30tl took my passport and registered the sim and loaded 4gb of data for 39tl, he inserted the sim and lo and behold it worked, then it didn't, then it worked, then it didn't. "Just as I said" he said, "lots of Europeans buy these and they will not work in Turkey"
Finally my solution was to buy a mini sim for my Ipad2 for 15tl and he transferred my data allowance from the sim to mini sim.
If you need a MiFi in Turkey buy a Turkish Multi Vinn DO NOT LISTEN TO PEOPLE WHO SAY BUY IN THE UK, THEY DO NOT WORK.
Anybody want to buy a brand new, never used HUAWEI E556.