Repairing No Service Issue on iPhone 7

Discussion in 'iPhone Tips, Help and Troubleshooting' started by thwdylm, Sep 26, 2018.

  1. thwdylm macrumors newbie

    Joined:
    Sep 26, 2018
    #1
    I have the model A1660, which was affected with this "No Service" curse seen here: https://www.apple.com/support/iphone-7-no-service/ but Apple will not repair my device because they found a problem with my dock connector (that functions perfectly) and only provided me with this: https://imgur.com/a/eQLiShh information as to why I must pay $319 for the repair. I called to see what they found, spoke to the "senior adviser" who could provide no details of the issue and offered little help.

    So, I must fix it on my own apparently (or pay $319 for a phone worth about $100 less than that). What specific issue in the device causes the phone to not recieve service?
     
  2. Minorite macrumors 6502

    Minorite

    Joined:
    May 8, 2018
    Location:
    Poland
    #2
    Issue is with baseband IC, there are tons of videos on youtube on the topic. Best solution: find a trusted repair shop that does microsoldering and ask how much will it cost to fix this. If less than Apple, go for it (MAKE A BACKUP FIRST!). If not, it would make more sense to get a new phone as I understand...
     
  3. Minho macrumors regular

    Minho

    Joined:
    Oct 4, 2017
    Location:
    Montreal, Canada
    #3
    The problem is that a high percentage of those "No Service" iPhone 7's are caused by a faulty Baseband IC. You cannot change the BB IC as it is code-locked with the CPU/NAND and EEPROM. Most micro-soldering shops won't even touch them as it is time consuming to troubleshoot only to find out that 80% of them are unfixable. That simply is not a viable repair when you work on a no fix/no fee policy.
     
  4. Minorite macrumors 6502

    Minorite

    Joined:
    May 8, 2018
    Location:
    Poland
    #4
    OK didn't know that, I had 2 phones with "No service" bug (mine a while ago and friend's phone recently), and there were no issues when we've brought it to the repair shop or after it was fixed. I knew it was wise to leave Wi-Fi without password for neighbours last year and clean my karma... :D

    p.s. Noob question, just for my info: No other solution then to replace the phone if it's dead? Or motherboard will be cheaper and should work?
     
  5. Minho macrumors regular

    Minho

    Joined:
    Oct 4, 2017
    Location:
    Montreal, Canada
    #5
    I should clarify here that there are two versions of the iPhone 7 logic board, one with an Intel baseband chipset and one with the Qualcomm baseband chipset. The problematic one is the Qualcomm chipset, where a high proportion of them fail due to a short inside the IC. This problem does not seem to afflict the Intel version...that would likely explain why you've had success with this repair.
     
  6. Minorite macrumors 6502

    Minorite

    Joined:
    May 8, 2018
    Location:
    Poland
    #6
    OK thanks for explaining this! Wasn't aware that they had both Intel and Qualcomm chips on A1660 model.
     

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5 September 26, 2018