Call sim verses Data sim

[Anonymous]

I have just purchased a Sim free Sony Xperia Z3 tablet model SGP621 which has 3G & 4G capabilities. I would like some advice on which sim to put in it. I know it needs a nano sim, but do I need a call sim or data sim? My mobile contract with O2 is PAYG using the same sim card as supplied with my original Nokia which was with BT Cellnet. I have never been one for making calls or sending texts (less than 100 in a Year), so PAYG suits me fine as I use Wi-Fi in the main for data access. I want to keep my existing mobile for making calls in the UK as it is more handy to carry. However I do envisage using the tablet to send text messages particularly when overseas on holiday where Wi-Fi can be hit and miss.

Ideally I would like to have the same mobile no, so I was thinking of getting a call nano sim and transfer the existing credit and number from my old BT Cellnet sim to the new one so that I can send & receive text's on the tablet  when overseas and then get a sim adapter so that I can put the new sim into my old mobile as this is more portable when in the UK. However it has been suggested that I need a data sim for the tablet as opposed to a call sim. If I choose this option is it possible send & receive texts from one and also make phone calls if required in an emergency? 

[Cleoriff]

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@Cairdeas wrote:
Thanks all. You guys are the best! X

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[la7]

If you want a sim for a few calls and text tesco mobile (use 02 and can use in 02 phone) payg is 8p per min and 4per text, http://www.tescomobile.com/help-and-support/1082-pay-as-you-go/1182-call-charges/pay-as-you-go-lite-...

For data GT ( runs on 02 network) and can use in o2 phone) £15 per month for unlimited calls and txt and 6gb of 4g and 3g data http://www.gtmobile.co.uk/en/bundle

[la7]

Giff gaff is slower for data than o2 tesco and lyca and gt mobile they are very low down on the network priority list

[Cairdeas]

Thank you @la7  x