Let us know below which S30 model you're using and if your apps are back to normal.
refer to the specific suite of pre-installed software—such as Opera Mini, Snake, and Bing Search—that comes hard-coded into the firmware of modern Nokia feature phones [2, 5]. Unlike smartphones, these "fixed" apps cannot be uninstalled, nor can new third-party applications be easily added, as the S30+ operating system lacks a traditional app store or native support for J2ME (.jar) files found on older Nokia models [2, 3]. The Evolution of Nokia S30+ nokia s30 apps fixed