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hi i want to buy iphone 7 and i want to know how choose one who didn’t had problems which audio or backlight chip.
They’re all affected by those issues - don’t focus on that when shopping. Focus on the shape of the phone and the carrier it’s locked to. Click me for more information For the 7, the AT&T/T-Mobile version - RUN, DO NOT BUY! The radio is GSM only (Intel), it doesn’t work on CDMA carriers and is affected by the radio defect. A lot of networks do not take it or strongly discourage using them, outside of budget prepaid. While they “work” with most GSM-based networks (and will take them, usually only due to FCC requirements if they do not want them for any other reason), but they have to support the right bands or the phone will be crippled because while both AT&T/T-Mo phones have the same bands, they are kneecapped by the missing CDMA radio. In the event they have issues, the carrier will say it’s YOUR FAULT if you buy an AT&T/T-Mobile 7 and use it on an MNVO that has limited access to the right towers. This is NOT an issue on factory unlocked models which started life as being carrier agnostic due to the radio (QCA GSM+CDMA radio, same as Verizon but without the Verizon certification). Unless you have to get the Verizon model* because they reject any other model you might as well buy the carrier-agnostic version. It costs a lot more, but avoids the radio issue altogether, the limited band issue, and the need to get it unlocked if need be.*Newer iPhones (8 and up) can be used on Verizon, but they MUST come directly from Apple as the AT&T/T-Mobile versions aren’t “certified”. However, if you get a very good price on the “bad 7” and ignore the warning to avoid it, do not rely on it to work for years and consider it MUST be used on AT&T/T-Mobile (as well as GSM MNVOs) and will never work on CDMA networks. The catch is they won’t “support” it unless you buy one from the same carrier unlocked. TL;DR: The AT&T/T-Mobile version is a lemon. RUN, do not buy it. The problem is a lot of people bought them so you need to be vigilant on the used market, which is why I do not touch the 7 used. The Verizon one is okay too but you may need a SIM card (even if inactive) but it is already unlocked. As such, any restrictions won’t be removed like if AT&T unlocks a phone using the Carrier XX.XX profile. The big no-go model is the Sprint model… DO NOT BUY THESE! Sprint will not GSM unlock them for domestic use (with an FCC exception, unlike Verizon) as they are hard-locked and were very, very custom due to their network at the time. Only buy these if you’re a Sprint customer, even post-merger. The reason they don’t unlock it is it predates the CTIA agreement, and go out of their way to punish owners of them because they can. They also did it with the CDMA MSL codes or opted to permanently code it to Sprint, so they do this intentionally and have no interest in getting better with these. Give the 8 a serious look just based on the nature of how bad the cellular radio is, as well as the variations. The 7 is hard to recommend due to the fact Apple let AT&T/T-Mobile alter the locked GSM versions so fatally, and they deserve all the shame they get online for it. Apple never does this, so they were probably paid well to make 2 versions and they paid by the GSM version having problems :-). Apple usually tells carriers to shove it on matters like this and just locks it, yet they made an exception that bit them in the rear one time, and never again after the radio disaster. They should have disabled the CDMA bands while the carrier locked it if the carriers whined until they caved. The radio limitations, defects and the fact one phone is significantly worse off due to it should be grounds to blacklist all 4 versions of the 7. To recap: Factory unlocked - GoodAT&T - Avoid, Intel radio.T-Mobile - Avoid, Intel radio.Verizon - Good (not cheap)Sprint - Only if you need it. Horrible unlock policy and stubborn CSR reps for non-customers, who hate you.
