What type of alert do you have for your instant messages ?

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I use to have a situation where I use the same ring tone for both instant messages and incomming calls and it use to confuse me a lot.You would find me saying hello,hello like an idiot only to find it was just a message.Consequently I am wondering what typeof arrangement do you have : *Same as incomming call *Different from incomming call *Do you download a customised (or bling ring tone) perhaps your favourite song *Do you use one of the ring tones that comes with the phone *Maybe you use vibration for your alert *Or it could be vibrate then ring and in this case what type of ring tone custome or preloaded. In cases where you use a dowloaded ringtone to a popular song ,we would like to hear which one you use.If it is preloaded one and it is well known like "happy birthday,we would also like to hear . You input in thi sissue could save many persons from embarrasment so it is highy appreaciated.