thanks for replaying again so fast, that was indeed helpful, however I've read that the libusb or something like that is not recommended to use at all, since it is quite outdated. Still trying to search for solutions. I've found quite a few, but I'm almost sure I'm misunderstanding the order of doing things, maybe you can help me. The guides I've found typically start when I'm in the loop, however, the error 1015 doesn't leads me to any loop, this is what happens:
1. put my iphone in DFU
2. start TU TSS server
3. open itunes, shift click restore, select the iOS to which I have the shsh blobs (4.1.0)
4. get error 1015 just before the loading bar below the apple logo on iphone screen finishes loading.
(this is where I suppose most guides start, also where things start to not match)
again, most guides talk about the device being in a 'loop' and not being able to get out of recovery mode, however, when the error goes off, I can slide to do an emergency call, and tap the unlock bottom to activate the SIM card [EDIT] which obviously doesn't activate (QUESTION!: at this point is this is the normal thing to happen? if it is, shouldn't at this moment I be in the 4.1.0 iOS I restored to using the shsh blobs?).
I tried to use iReb but that didn't work, at least not the way I did it, which was DFU -> press the 'set auto-boot true (fixes 1015 errors / recovery loops) and THEN TU -> then itunes, but still got the error so I guess either I'm really unlucky or I did something wrong.
Anway sorry for being so stubborn, and thanks a lot for trying to help me, hope you or someone else could respond this reply really soon