iOS famously doesn't allow reloading themes or software. It's part of why they struggled to find a carrier to launch with in the beginning, because carriers modifying phones used to be the norm.
There are settings carriers can push to iOS (access to features like tethering, some network configuration stuff) but this type of malware cannot be pushed onto iOS. At worst, carriers push shitty Java applets to the (e)SIM, but that's all sandboxed off from any user interaction.
There are settings carriers can push to iOS (access to features like tethering, some network configuration stuff) but this type of malware cannot be pushed onto iOS. At worst, carriers push shitty Java applets to the (e)SIM, but that's all sandboxed off from any user interaction.