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Depends - if you are (or were on saturday) somewhere with terrible signal and haven't used the phone since then, it's possible that the message didn't come through and your carrier didn't bother resending till you re-connected during the phone call. I've had stuff like that before but normally over a period of hours rather than days.
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SMS is not guaranteed, so messages can be sent by the sender and remain on the network without being delivered for some time, up until a week I think from my memory of the spec.
However, spoofing is easily done;
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On my (Android) phone, messages are normally timestamped by receipt, but tapping the message reveals the timestamp of sending.
According to http://www.tomshardware.co.uk/forum/33715-39-time-stamp-messages the sending timestamp is set by the sender's network, not the sender's device (or application).
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If you had no network or your phone was off I wouldn't be surprised by an SMS delay.
Mobile coverage out here varies from intermittent if I'm lucky, to none at all, and it can sometimes be days before I go into town - texts taking several days to come through or being re-sent three or four times (presumably by the senders' service provider) are not unusual in in the wilds of Shropshire.
Having said that, you'd probably notice if your phone wasn't working or you'd spent three days away from civilization?
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Dramatic_Hammer
andyp
Emyr
MrE
@Scilly.Suffolk
I assume there's an app to spoof SMS?
I took a phone call last evening, that revolved around me not receiving a text message on Saturday.
As I put my phone down I saw I had an unread message: the one that was supposedly sent on Saturday and it showed that that was when it was sent...
Against the date and time is a locked padlock symbol, which suggests that the date and time can be edited.