if you are looking for a cheap dual SIM phone other than a Chinese one, Samsung C3212 is your solution. it's a dual SIM phone which allows dual standby. Samsung C3212 has very critical features only therefore it's cheap.
this phone is a 2G phone and it has a 2 inch color display. the internal memory is 15MB and it also supports up to 8GB memory cards. it has bluetooth and supports USB 2.0. also Samsung C3212 has a good stereo FM radio with RDS. unlike many other phones, you can record the FM radio. it has a VGA camera which also allows video recording. there is another funny application named Fake call in this phone. it allows you to get fake calls and cheat your friends.