Many users have told me their 3G/4G LTE data network connection is broke after installing a custom ROM. Well, in most of these cases, it can easily be fixed by manually setting the APN (Access Point Name). This applies to any GSM networks such as AT&T or T-Mobile. For CDMA networks like Sprint or Verizon, they also use APNs but you don’t have to set them and should work out of the box.
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