You are trying to get to EXACTLY frame 267, no higher, no lower, just so you can keep track easier, here are what the last 10 phonecalls INCLUDING THE CALL that makes it frame 267 will be. Good luck!
257: Evolution~ 8c8bdef3
258: Kanto~ 986e57ea
259: PKRS~ eec11b15
260: PKRS~ c5b74e64
261: Kanto~ e473907
262: Kanto~ aa1dca6e
263: Evolution~ 1711549
264: PKRS~ 1118ae88
265: PKRS~ 51e0205b
266: PKRS~ 47abe132
267: Kanto~ c1787ebd