Nokia phone question ~urgent~?

hi in about 9 hours i am going to Bali for almost a month (23 days) I am bringing 2 phones and I was wondering about a couple of questions here they are:
1. Are the nokia 6121, nokia 6300 triband and motorola krzr k1?
2. If I buy simcards for them over there will I need to use triband or any other features?
3. what the easiest way to find out if my hpne is unlocked apart from putting another simcard in because I don't have another one.
4. how do I turn on triband and change the GSM and all that on a nokia and motorola??

thank you and if you have any other information I might need to help please post it.