SonyXperiaJ(st26i)lost system app(settings)

[honda CR]

Hello,my sony xperia was rooted and its now unrooted,while it was rooted my settings application just randomly uninstalled itself.Ive downloaded lots of apk's(com.android.settings)and none of them will install onto my phone.Does anyone know how I could get this app back?Help would be much appreciated as I need to change settings.Thanks

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