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I can't seem to make phone calls from my Nokia Lumia 735 at all. I get 'system busy' followed by 'call dropped' without fail. This is a great phone for the Internet and email but it's pretty useless if it can't do function No.1: make a phone call. Getting very fed up. Any advice very welcome.

  • Can you share a screenshot for the same? Also System busy should be sent by the mobile operator. Can you try inserting the sim in other phone? And if its possible, replace the phone. – whihathac Feb 19 '15 at 19:07
  • Have you approached your network operator about this issue? – Rowland Shaw Feb 20 '15 at 17:31
  • What network are you on? I know there have been "issues" with the O2 due to a massive mast upgrade programme recently, if you're in the UK, and use O2 (or BT) – Rowland Shaw Feb 28 '15 at 9:04

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