There are limitations, 30 SMS per day to Indian networks. Many other operators are supported with 20 - 30 SMS limit per day. Moreover, you gain credits when you receive a reply from a mobile, which increases the credit limit for the day. So if your credit for the day is over, you can wait for a mobile user to reply to your message so that you’ll regain a credit. Otherwise, you can wait 24 hours from the first time your account was active for the day to receive your daily message credits. However, Credits not used during the day are not carried over to the next day. To check your available credit, from your Chikka Messenger client, click on the Control Panel button and select Options, then click on Show Available Credits. You can have SMS forwarded to your mobile if you are offline and also you alert your friends when you go online in Chikka messenger. I hope they will start MMS as well soon as its already available in Philippines. Chikka's revenue comes from the revenue earned when a mobile user replies to message sent from Chikka Messenger. Yes, there is a 5 message limit per buddy, until they reply back. Thats the only downside, other than that, it works really well !