Normal straight talk apn settings,also explain why they were fine before the upgrade to kitty Kat? It is the only obvious choice and Google it,it isn't just me and it's also happening to the nexus5 and the new card lte SIM att as well, I have tried every combo there is and I still have my s4 with jelly bean,same settings sane SIM card no problems, the only difference is I can put in that ip4/ setting on my s4
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