The fee includes unlimited incoming and outgoing messages with a 4KB, or 4, 000 character, limit per e-mail on the Sharp and JVC Devices.

CNN: E-mail arrives in your pocket

In using social networks, issuers will need to respect the social nature of the media and focus outgoing messages on discount and promotional announcements and responses to customer inquiries.

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Redmond, Washington-based Microsoft (nyse: MSFT) employees saw their outgoing e-mail messages get mired in the company's internal e-mail network, taking as long as four days to reach recipients, reports say.

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The company reported its youth-oriented brand, Hi, saw an 8% decline in outgoing SMS or text messages per customer in the first three months of this year compared with the first quarter of 2010.

WSJ: Cellphone Carriers Face Pressure Over Texting

Redmond, Washington-based Microsoft (nyse: MSFT - news - people) employees saw their outgoing e-mail messages get mired in the company's internal e-mail network, taking as long as four days to reach recipients, reports say.

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Geva Rechav, a Google product manager for emerging markets, confirmed in a blog post that Gmail SMS messages will be free to receive, but standard fees will apply for outgoing emails.

ENGADGET: Google launches Gmail SMS for text-based email in Ghana, Nigeria and Kenya