Verizon Wireless will not support Apple’s dual-SIM technology at first due to a software bug that degrades service. The new Apple iPhones (Xs, Xs Max, Xr) support dual-SIM functionality thanks to one physical SIM and one eSIM. The way dual-SIM phones typically work is to designate a primary SIM for voice, text, and data, with a secondary SIM handling voice and messaging through a second subscription. Many dual-SIM phones allow you to switch which SIM is designated as the primary/secondary at will. With the new iPhones, a third option exists that uses the primary SIM for iMessage and FaceTime, and the secondary for data. AT&T and T-Mobile’s systems are able to handle SIM switching without issue. According to PCMag, when a Verizon physical SIM is designated as the secondary account, it drops to 2G CDMA data, which is slow, not widely available, and doesn’t support MMS. Verizon confirmed the issue to PCMag and said it is working on a fix. “Wireless customers will be able to activate Verizon service eSIMs as soon as we’re confident you’ll be able to have the great, high-quality service you expect from us on both your primary and secondary line. If you are a Verizon customer and you activate another carrier’s service on your iPhone’s eSIM, your Verizon service will be degraded due to the current software configuration. We believe these concerns will be resolved quickly and you should be able to add our great Verizon service on your secondary line before the end of the year.” Verizon said that until the secondary SIM supports all its LTE-based services, it won’t activate service on any eSIM for now. Apple is activating the dual-SIM feature on its new iPhones today via iOS 12.1.
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