No. Apple stops signing older iOS versions within weeks of a new release. Even if you had a modified IPSW, the signature verification would fail. The only exception is if you saved SHSH blobs (advanced users only, and not for full firmware modification).
Antes de proceder, es importante tener en cuenta que descargar y instalar firmware modificado en tu iPhone 11 puede anular la garantía y puede causar problemas de estabilidad y seguridad en tu dispositivo. Procede con precaución. descargar firmware modificado iphone 11 work
For non-jailbroken iPhone 11 devices, uses a backup injection method to change system fonts, status bar icons, and lock screen text. No firmware download required. All changes are reversible. status bar icons