APN settings should be on your phone depending which service providers u get the phone from. In Singapore all android phones are unlock. But u may not have the APN settings if u did not get it from your service provider. For eg, the APN inside is e-ideas or IDEAS which means the settings is from SIngtel and only works for Singtel customers. If u are a Starhub or M1 customers, u need to get the APN of your service provider in order to surf internet, read email, mms.

This is the APN settings for Singtel on an Android Phone(Post Paid Customers)

Name:IDEAS E-Mail
APN: e-ideas
Proxy:(Not set)
Port(Not Set)
User Name:(Not Set)
Password: (Not Set)
Server:(Not Set)
MMSC: http://mms.singtel.com:10021/mmsc
MMSC proxy:165.21.42.84
MMS Port:8080
MCC:525
MNC:01
Authentication type:PAP
APN Type:internet + mms

Singtel Pre Paid Customers, pls refer to the PDF Guide by clicking here>>>

APN Settings for M1 and Starhub

Starhub

 APN: shwapint

• Username: LEAVE_BLANK
• Password: LEAVE_BLANK

APN: shwap

• Username: LEAVE_BLANK
• Password: LEAVE_BLANK
• Proxy: 10.12.1.2
• Port: 80

M1

 APN: sunsurf

• Username: 65
• Password: user123

APN: miworld

• Username: 65
• Password: user123