I have the samsung ":)" and i haven't been getting sms for about 24 hours now. I deleted my inbox/outbox turned off the phone, removed battery+sim card etc, still nothing. Still have an old nokia so i put my sim card in and still am not getting texts.
(i know my parents texted me a few times and i didn't get the texts, and i texted myself to see if it'd work and i didn't get those messages on either phone)