I have a jailbroken fourth-generation iPad running iOS 6.1.3. I'd like to upgrade it to some higher iOS, but not the latest iOS (10.3.3 or 11), since no jailbreak exists for that. My question is, is there anyway I can upgrade my iPad to an iOS for which a jailbreak exists?
I think the short answer to my question is "blobs". In the old days there was just SHSH blobs, but now the terminology is more complicated, like SHSH2, ApTicket, and TSS. In any case, how do I check if I have the right kind of blobs to do the kind of upgrade I want? Are they still saved in Cydia like in the old days, or what?