The mobile phone can't send short messages, and the number of the information center is no problem. You can receive short messages or use fetion.

It should be a system problem. As long as the phone doesn't fall, the hardware problem is not big. Has the landlord installed any software recently? Please delete it and try again. Or what prefix is added before your friend's number, such as 1795 1 ... If it doesn't work, you can solve it after the soft grid, "*#7370#", but remember to back up the address book and important information, which will be deleted after the soft grid. It's best to add a card at the same time, but there will be many programs in the memory card that can't fit. I hope it will help the landlord.