ver 0.3: Fix support for phonebook reading. Fix some issues with network registration. Fix some issues with MSISDN handling. Fix some issues with SIM storage support. Add caching for EF-PNN and EF-OPL SIM files. Add support for SIM ADN type number handling. Add support for tracking message waiting indications. Add support for user-provided AT parsers. Add initial drafts of API documentation. ver 0.2: Add more detailed handling for network names. Add character set support for phonebook. Add SIM file reading and writing utilities. Add experimental support for MT incoming SMS store. Add special support for ti_calypso based devices. ver 0.1: Initial public release.