These ringtones are all worked out by me. They are monophonic, and work on Nokia phones. I don't know about other makes. To enter them, you must be in the Composer (look in your manual) and enter the sequence of keypresses as listed. Brackets around a number means keep the number pressed until a dot appears.
1835765312461*7**
Tempo=112: 5*8576993885**3*7767928#4#651*17**1*197**8443496**81*#3277677968392839(5)182*212292829#2#38(2)9
Tempo=100: 58854#5609(6)97809(7)928*0919908818817**6505#605#505555505#605#5
Tempo=140: (4)84586958491829(4)(1)9088(4)8(5)(6)548(5)9568(5)99(1)8118(4)9118(2)9(2)(5)9(3)8338(3)99(1)8238(4)99
Tempo=140: 591(4)#5886(5)(3)1(4)#95886599252*29(1)#8788**1*#2999
Tempo=125: 588505031919*6**58850503192995888505031919*6**5885050329199