Given how competent and powerful smartphones have become, it is easy to take for granted essential tasks they handle, like voice calling or text messaging. In the event of an internet outage, the SMS app on your phone might become an important lifeline, and with the benefits of RCS messaging on Android and coming to iPhones later this year, it could very well temporarily substitute the likes of WhatsApp or Facebook Messenger. Phone displays have also been getting bigger, allowing
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