Hi. Me and other users from XDA have problem with sending SMS that have more than 160 letters. This issue is only on MIUI based on Android 4.2, previous versions based on Android 4.1 don't have this problem. Messages are instantly described as not send. Someone on XDA redirect us to post on this forum: http://xiaomi.eu/community/threads/...s-time-issues-random-reboots.3022/#post-31568 But other ROMs based on 4.2 , 4.3 and 4.4 can send long SMS.