samsung t100---> enter now

hey i have 2 questions

1. is anyone know how to change the opening logo in the samsung t100

2. can i change the sms and clock alarm sound?

clock can be changed by going to alarm and then alarm tone.
sms can be done by going to the ringtone bit and changin message alert

i dont know

10x but i know how to change the sound in my phone
i want to add another sound and use it for the sms or alarm

u know...sound to add with my cable

yes you can!!!! but i dont know how

You can but you need to flash your phone with a custom firmware.
lmk if you need to know where to find some

for some firmware u can try www.t100.org .. they have many information there