I have searched high and low on this site and the net and can't find what the differences are between ROM version 1.11, 1.12 & 1.13.
I know they will be only small but lets list them.
This is the Whats New items with the O2 Mini ROM V1.11
Latest updates on Microsoft Windows Mobile - latest Microsoft AKU(*) release 2.6 for Windows Mobiles 2003 Second Edition. MMS client - MMS client upgraded to 22.214.171.124 with improvements in interoperability. Radio software - Tested in major operators network in Asia. Improvements on GRPS and GSM performance. New and updated operator network settings - New additional operator settings for CTM (Macau), Orange (Thailand), Peoples (Hong Kong) and Sun Cellular (Philippines). Resolutions to known issues * Fine-tuned speaker phone echo cancellation * Improved audio quality * Occasional radio no signal when PDA wake-up base band * Occasional AEC failure during voice call * Occasional failure in receiving cell broadcast message after reset * Other party unable to hear voice using Bluetooth headset 5 minutes after device goes into power safe mode * Updated keyboard mapping * "Load text failed!" displays in localization builds in MMS * Time stamp incorrect in message info in MMS