How to Activate a New Sun Cellular SIM

By Melly Parker

When you travel internationally and still want phone service, use a SIM card from a local provider to connect to the mobile network. Sun Cellular offers voice, text, mobile Web and GPRS service in the Philippines. You must have an unlocked GSM phone to use a Sun Cellular SIM card.

Step 1

Power down your phone. Remove the battery cover and battery to expose the SIM slot.

Step 2

Insert your SIM card into your phone. The gold contacts on the card should face down.

Step 3

Replace the battery and battery cover and then power on the phone.

Step 4

Create a new text message. Enter "2300" in the recipient field.

Type "NET" in the message field. Click "Send" to transmit the message and activate your SIM.

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