Got a BB from UK, can it be use in Singapore with their local BB local internet service plan? That means wil be using S'pore telco sim card.

Wirelessly posted (BlackBerry7100/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/125)

If it's unlocked, you should be able to use it.

How do I know whether is unlock? Can someone from UK kindly reply to me. thank you.

Where did you buy it from? If you bought it from a service provider, then it's most likely not unlocked. If you bought it on ebay, there's a chance it could be unlocked.

How do I know whether is unlock? Can someone from UK kindly reply to me. thank you.

The phone is a gift from someone. Bought T-Mobile (Telco)

A service provider will almost never sell an unlocked phone. It doesn't serve them well financially. If you tell the service provider that you're going to another country and need to use the phone with a pre-paid SIM card, in many cases they will give you the unlock code and instructions to unlock it.

I'm from the Uk and on T-mo so I will try to help.

It it's a genuine T-mo sim and you have either pay as you go or a contract with them, then you will have no problems using it. What you will find is that it's very expensive.

Using a local card won't work through T-mo (I'm pretty sure) as T-mo will want you to roam using their sim.

Providing the phone still works with another sim in it you should be able to use the local sim. (I think that is what is meant by unlocked) Best idea, I think, is to try a different provider's sim in it now and see what happens.

Thank you. The phone was not mine. It belongs to my boss. It does come with T-Mobile SIM card. It can be use in S'pore with autoroaming. I was task to setup the email for her. But no info provided I do not know whether it come with Blackberry Internet Service Plan. She wants to access to COY's email service on the go... If she really have that plan... where to setup? Many thanks.

Okay. I'm no expert on this, and I don't know what COY is, but I think the first thing you need to do is to get the phone from your boss and see it it's set up for email and browsing. If it's not, then the easiest way to do this is to contact T-mo and set up a data plan with them. Then put your boss's email accounts on that - T-mo will help you do this.

Then ask them to set up the cheapest way of accessing the email in Singapore - probably means purchasing an international data plan.