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2014년 9월 19일에 출시된 이 4.7” 스크린 iPhone은 iPhone 6 Plus의 작은 버전입니다. 모델 번호 A1549, A1586 및 A1589로 식별됩니다.

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No Service on iPhone 6 - Tried Multiple SIMs

My iPhone 6, factory locked to AT&T, refuses to connect to the network even after at least 10 DFU (or iTunes) restores (always setting up as new iPhone). I've tried multiple known-good SIM cards. Of course, I've also tried the obvious such as "Reset Network Settings", getting a new SIM from AT&T, and enabling/disabling various settings such as LTE and roaming options; all wit no avail. My iPhone is out of warranty therefore taking it to Apple isn't an option. I've already replaced the lower Lightning dock connecter assembly which has one antenna, of course. Also replaced the antenna at the far top center of the device on the back side of the motherboard. Absolutely no luck. Any suggestions?

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Check in settings>general>about. Does the IMEI # show up?

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@patrick , you are asking the right question, but i assume if it passed 10 restores the IMEI must be there.

However, these phone are notorious for fractures in the cellular area, and they are not fun to fix. Chance are the issue is a fracture under the transceiver ic, or one of the cellular amps. You should probably get someone who is experienced with board level repair to take a look at it. There's a link on my profile that can help you locate someone near you, and they all accept mail-in repair.

Cheers

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IMEI shows properly and does not register as blacklisted. AT&T unlocked the phone last night and I attempted to use a Verizon SIM. The device successfully activated, but still "No Service". I am not the original owner. I've been a cellphone and Mac/PC technician for 10 years in a rural area so there aren't many individuals I can speak to for a second opinion. In my community, if I can't solve the issue or at least provide an answer, customers toss their device. This is probably the 2nd issue in my entire career that I've genuinely not been able to at least find out why. The previous owner had an inexperienced technician work on it. This "technician" replaced the Lighting dock assembly as well as the display, but the "No Service" issue began long after this repair took place. I'm stumped. I agree, however, it must be some non-removable (without desoldering) component on the motherboard. I'd just love a second opinion on any cost-effective methods of remedying this situation before I begin scrapping it.

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Its definitely a soldered part, but don't scrap it yet. Send the board to someone for board level diagnosis. Its much more cost effective than it sounds, and many offer a "no fix, no fee" service. Chances are its the transceiver IC, which is a common issue in the iPhone 6. If it can be repaired, it will surely be less than the cost of replacing the board :)

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@microsoldering Thank you very much! I'll search for a reasonable price and see if it's doable for me. Glad I didn't have much in it.

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