Samsung Guru Music 2 can store up to 500 sms.
Yes, you can do conference calls from this mobile phone.
Yes, Samsung Guru Music 2 has speed dial function.
Yes, you can use 3.5 mm headphones in this mobile phone.
Samsung B310 comes with 800 mAh battery. But it is very efficient. You do not require to charge the phone for almost 3 days with moderate usage.