The roaming services per se is expensive. Imagine, you get an incoming message or an incoming call while out of the country and you’ll get charged for that. Not for a measly one digit with a two-decimal-precision but a two digit (for SMS) and up to four digit total charges (for calls). For the postpaid subscribers, I know that you would not want to have your bills to reach more than what you’re currently paying for your plan. And for the prepaid subscribers, you would not want to spend most of your shopping money to prepaid cards.
Here are alternatives to Roaming services provided by the three mobile networks:
If you are abroad, and have access to PC and the Internet, use Chikka to send messages. For those who will be texting Sun Cellular subscribers, they are also Chikka-powered already. Or if not, use the more traditional e-mail and Instant Messaging services to get your message across.
And if your phone is capable of supporting the networks of the country you’re currently located, just buy a prepaid SIM card there. At least it won’t be that much heavy for your pocket. 😀