1. ThaKrazyOne's Avatar
    I was wondering if anyone has or had the same issue. I purchased the 520 at the beginning of the month and within the first 3-4 days got my first SIM error. No biggie since the SIM was originally provisioned for an iPhone 4 3G data plan so I called had it provisioned to the Lumia at the 4G HSPA+ data plan. Either way had to shut off the phone, remove and re-insert the SIM to get it up and running again. 3 days later I got the same error again. This time I went to an AT&T store and switched out the SIM to avoid any further issues. Yesterday I went to the movies and the phone was OK going in. After the movie was over, walked out to check the time and again No Service. I had to do the removal and re-insert again and I was fine. Then this morning same thing after being on the charger all night. Since then it has been OK so far. I already contacted Microsoft and was told that since the phone is only 2 weeks old I can go to the Microsoft store and exchange it. I just want to make sure this is an isolated incident before I go an swap it.
    08-19-2013 11:27 PM
  2. WanderingTraveler's Avatar
    Hmm. I occasionally get SIM Errors (largely because my network is crappy and my SIM is old), so it's most likely an isolated case.
    08-19-2013 11:37 PM
  3. ThaKrazyOne's Avatar
    Well I just ended up exchanging the phone so all good now. I am working on maybe getting a pre-owned 820 or 920 soon
    08-26-2013 11:50 PM
  4. aejanne's Avatar
    Excuse me? I had also same problem. I've been using my Sim card about 3 yrs, then last 2 months I've decided to cut my simcard to micro sim since I got my new nokia lumia phone. And now my phone always says "Sim error" Can you tell me what's really the problem? Thanks :)
    01-12-2014 08:50 PM
  5. ndowens's Avatar
    I hear sometimes that if a regular sim is cut to a micro-sim, there is a possibility that it will ruin the sim
    01-13-2014 07:55 PM

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