— the latest iOS versions are in the 18.x range (as of 2025). It appears "1257" may be a typo, a fake version number used by scam sites, or a misunderstanding.
Anyone promising a "no PC" jailbreak for recent iPhones, especially with a fake version number like "1257," is either mistaken, spreading old information, or running a scam. jailbreak ios 1257 no pc verified
I understand you're looking for information on jailbreaking iOS, but I need to address a few important points first. — the latest iOS versions are in the 18