Apple Watch Adakah Telefon Bebas CDMA Sprint Pertama

Apple Watch Siri 3

LTE baru Apple Watch Siri 3 doesn’t have the CDMA radio system upon which Sprint and Verizon have long relied. And yet it makes phone calls. No Sprint device has combined those factors before, and the watch’s abilities hint at a future when a wider range of devices will be available on these networks.

Beyond being technically interesting, this opens up hope that Verizon and Sprint subscribers will be able to use phones that haven’t been pre-approved by their carriers. There’s some good news and bad news there.

CDMA, Buat Jalan

CDMA2000 is a 2G mobile standard thatXCHARXs used by Verizon, Sprint, U.S. Cellular, and carriers in China, Japan, Korea, Indonesia, and a few other countries. ItXCHARXs less popular than the bigger GSM/UMTS standard. One of its aspects that carriers love, but consumers tend to hate, is that CDMA carriers can restrict their networks so only approved phones can be used. GSM networks must accept any compatible phone.

Both Verizon and Sprint want to rusticate their CDMA networks … eventually. ItXCHARXs a 2G, 20th-century technology that is reaching the end of its useful life. Verizon has set a date at the end of 2019 to kill CDMA.

SprintXCHARXs in a tougher position because it hasnXCHARXt matched its CDMA coverage with 4G LTE yet. ItXCHARXs not giving a date to turn off CDMA, I think because itXCHARXs waiting for confidence that it can offer LTE coverage everywhere it currently has CDMA.

Selain liputan, satu perkara yang baik CDMA adalah membuat panggilan telefon. Verizon telah berusaha untuk memindahkan semua penggunanya ke VoLTE, suara-over-LTE, yang membolehkan pengguna Verizon membuat panggilan pada 4G LTE tanpa perlu menyentuh rangkaian 2G itu.

Sprint hasn’t yet announced any rollout date for industry standard VoLTE. But it has a stopgap. In June, the company introduced “Memanggil Plus,” which essentially routes Wi-Fi phone calls over the LTE network. It isn’t the broad VoLTE standard that the other carriers use, though, which means that phones have to support Sprint Calling Plus as a special extra feature.

But wait! It gets even weirder. According to Sprint, the Apple Watch doesn’t use Calling Plus or VoLTE. It uses another form of voice-over-IP to make phone calls, which I couldn’t get more details on.

Both carriers have had a few LTE-only devices. SprintXCHARXs Slate 8 and Slate 8 Plus tablets, and its LTE-only mobile hotspots, didnXCHARXt have to make phone calls. The Watch is the first XCHARXphoneXCHARX on Sprint to run without CDMA. (I have to insert here: Sprint doesnXCHARXt call it a phone, they call it a wearable. But itXCHARXs a wearable that works like a phone.) ThatXCHARXs a major technical milestone for Sprint.

Verizon telah bereksperimen dengan peranti LTE sahaja lebih lama daripada Sprint, sebahagiannya kerana ia mempunyai liputan LTE yang lebih baik. Ia kini mempunyai Asus Zenfone AR telefon pintar dan telefon flip, LG LTE Exalt, berjalan sebagai telefon LTE sahaja.

No CDMA Doesn’t Mean Freedom

Here’s the rub, though. It doesn’t look like getting rid of CDMA is going to create consumer freedom on Verizon’s and Sprint’s networks.

Buat masa ini, menyokong panggilan telefon di Sprint bermakna menyokong perisian Sprint proprietari, yang bermaksud bekerja dengan Sprint.

Verizon says it uses global LTE standards. But we’ve tried a few devices that Verizon hasn’t approved, and mysteriously, they don’t work. They just don’t authenticate. Users of the ZTE Axon 7 telefon telah melihat bagaimana telefon mereka yang serasi perlu sentiasa didatangkan, diurut, dan kadang-kadang digodam untuk terus bekerja di Verizon. Jadi untuk sekarang, pelanggan Verizon perlu melekat dengan telefon yang diluluskan oleh Verizon.

Langkah ini pada umumnya berita baik untuk Verizon dan Sprint dan pengguna mereka, walaupun, untuk alasan yang berbeza. Kedua-dua syarikat penerbangan itu menumpukan banyak spektrum tanpa wayar yang berharga kepada CDMA. Memandangkan mereka mendapatkan lebih banyak peranti LTE sahaja dalam talian, mereka boleh melangkau lebih banyak spektrum tersebut ke LTE, mengurangkan kesesakan LTE dan meningkatkan kelajuan. Oleh itu, Apple Watch selular anda akan membantu menyumbang kepada pengalaman panggilan yang lebih baik untuk semua orang di rangkaian anda.

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