@huchengtw-moz yes, you are right! So we should do the merge in case `apn`, `user`, and `password` settings are the same and them merge (update) -I guess- the proxy settings. @KenChang is that way how we should deal with proxy settings in case  `apn`, `user`, and `password` settings are the same? I think this is safe since MMS APNs don't have proxy settings but MMS proxy settings.