Uploaded July 2015 | Updated September 2026, 1 hour ago

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Nano SIM, micro SIM and regular SIM - what's the difference and how do you swap betwen the three? With most flagship smartphones moving towards nano SIM cards you might be left wondering how to change from your micro or regular SIM card without losing your phone number. Let O2 Business talk you through it - it's not as scary as it sounds!

For more on O2 business visit: o2.uk/KONM0P