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这款4.7英寸iPhone于2014年9月19日发布，是iPhone 6 Plus的缩小版。

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No service and works, no service again.

The wife has an iPhone 6. And Litterally just after she finished a phone call, the phone went into no service.

So tried my Sim (different network) and still the same.

Did a reboot, network reset, switch from airplane mode and back. Still shows baseband number when dialing *#number

And a check mend report shows the number imei is still clear/not cloned.

Service will randomly come back for a while, then go.

Replaced the top antenna, still done the same thing. Replaced the bottom antenna/charging port. And it worked for 3 hours, then just went back to no service again.

Only thing left is a factory reset, but I really doubt it's something like that. Plus my PC doesn't seem to like restoring iphones. I always get iTunes errors during the process.

I'm out of ideas now.

Thanks.

Update (03/27/2017)

OK. So done a restore. It lasted 24 hours, and it still does the same thing. It works, then goes into "no service"

Now wondering if it's board level repair?

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Does the phone have a history of water damage?

I see and fix a lot of phones. Nowadays, cellular issues are nearly always software. There are next to no parts in the actual cellular system of the phones and there are 12 billion parts in the software/firmware.

Personally, I would only suspect board level issues if the phone has been wet and/or had a severe drop. But at that point you are looking at a couple hundred dollars for the repair and a new iP 6 is around the same price.

Keep thinking software. What is the reception like when this occurs. Does it happen with the same frequency in high reception areas as low reception? Does wifi being on affect it?

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It's been stuck on searching/no service for over a day now. I've just put my Three sim in, and it detects it's Three, but still on searching/no service.

She's normally got 3 to 4 bars out of 5 where we are. Network I'm on with my Galaxy S6 gets full signal, but still does the same thing in her phone....Nothing.

There's a shop in Nottingham who can do board level repair for £70, so will be sending it off to him.

Hopefully he'll be able to get to the bottom of it, and then I'll post on here what I get back.

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I'm familiar with the Nottingham guys. I've heard nothing but good things about them.

Please update. I like "strange" issues like this because this is how I learn new things. I am very curious to hear what they find.

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Have you tried a Hard Reset? Hold down the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Doing this might help. I would try this before doing a factory reset.

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Yes. Was one of the first things I done.

No difference unfortunately

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It is the software on your phone that may be causing the problem. Use itunes to restore your phone to factory settings. If itunes does not work on your windows pc as expected uninstall itunes as follows in this order:

Remove iTunes and its related components from the Control Panel

Alot of the files have old dates. So uninstall and reinstall after removing files.

Use the Control Panel to uninstall iTunes and related software components in the following order:

1. iTunes

2. Apple Software Update

3. Apple Mobile Device Support

4. Bonjour

5. Apple Application Support 32-bit

6. Apple Application Support 64-bit

On some systems, iTunes might install two versions of Apple Application Support. This is expected. If both are present, be sure to uninstall both versions.

Don't uninstall these components in a different order, or only uninstall some of them. Doing so might have unintended effects. After you uninstall a component, you might be prompted to restart your computer. Wait to restart your computer until you're finished removing all of the components. as follows.

Reinstall software. https://www.apple.com/itunes/download/

Backup your phone to itunes or icloud.

Then restore.

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OK. Thanks for that. Was hoping it wasn't something like this, but only choice I have left now.

Interesting about in which order to uninstall bits. Hopefully it'll work this time round.

Thanks, I'll update once done.

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I had the same experience with my iPhone 6 Plus. Turned out to be a faulty sim reader. I replaced it myself and it worked like a charm! But I wouldn't recommend you try this repair unless you've ruled out all other causes. It's not a simple repair, as it is soldered to the motherboard and requires decent experience with microsoldering.

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Done a bit of soldering, but not micro soldering.

Thanks for that, I'll look into it!

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Thought I'd update the post:

So sent the phone off to a reputable service centre in the UK which specialises in micro soldering.

They diagnosed it as the baseband chip, reflowed it, then service came back temporarily and went back to no service. They done it again, but still the same thing, so they are now sending it back.

Looks like it'll be an insurance job now!

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