* fixes a bug in multipart sms
* adds a new call to read the sim phone number (partially functioanl)

Signed-off-by: John Crispin <blogic@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@43310 3c298f89-4303-0410-b956-a3cf2f4a3e73