Well I recently bit the bullet and reformatted the memory on my phone due to various problems it had given me. A good test then for the MightyPhone sync service to save all my contacts and diary.
Well it failed. After a ful sync, none of my mobile numbers had been transferred. Pah!!! Bloody useless. Then ti dawned on me why! I keep all my mobile numbers in the form of number + intl diallign code.
+4412345 123 123
SyncML failed to recognise this and did not sync it.
So I tried
+44 (0) 1234 123 123
and waddayaknow. it synced fine!!