1. Obed Nimoh Kwakye's Avatar
    SIM error - contact mobile operators but don't know what that mobile operators mean
    05-23-2017 08:09 PM
  2. xandros9's Avatar
    Mobile operators is another term to refer to cellular service providers/carriers. Examples include T-Mobile, Rogers, Telus...

    As for unlocking a SIM lock, you'll need to contact the carrier that your 635 is locked to.
    05-24-2017 11:19 AM

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