30 days add on / when to buy.

Is it possible to get a 30 day add on as we will be in Thailand for a month? Also, is it possible to pay for an add on while already away from the UK? ( We will be in Malaysia for 11 days before heading to Thailand. )
TIA - Rich.

Look at higher plans as could change to it for that period to get access ( if country is listed )

A lot of travellers use EsimDB if your phone supports esim.

TrickyDicky Yes, you can buy top-ups when abroad in another country just use use the Lebara APP to add your required add on when [in your case] you are in Malaysia, which you access while using the WI-FI in the hotel [or whever you are staying] I have added add-ons when abroad in various countries in the past. The only additional advice I would give you is to use a VPN, as hotel or other public type WI-FI are notoriously weak security and you do not want to 'leak' you payment details to someone else. You don't need to invest in a costly VPN if you download the Opera browser APP [available for Android and iPhone] that has a free built in VPN that you can activate [other VPNs are available ]