Is there any way to top up UK T-Mobile Sim while in Canada?

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Originally Posted by MATHA531

After leaving customs at LHR, there are hoardes of shops that take the swipe card...within 30 seconds of leaving customs, you can top up...it's no problem......

One last question. Is each top-up card tied in to the sim card it came with? So basically if they are, then all I do is give the kiosk person 5pounds along with the etopup card, correct?