IIRC; this only works if you have jailbroken previously, it is normal that you will have to reapply the hotfix and reinstall packages that are installed through MRPI. Also you can keep using Wifi if you have your OTA binaries renamed as per
this post. I have been using my PW5 on 5.14.2 with my OTA binaries renamed for 3 months now and still hasn't gotten an auto update.