Question needs more information. Which country and which operator
Buy Roaming sim cards.
yes
Yes
1p
check with your carrier. often it is quite expensive.
Yes, a US SIM card will work in Canada, but roaming charges may apply.
Yes, UK SIM cards can work in Bangladesh if they are unlocked and support international roaming. However, roaming charges can be quite high, so it's advisable to check with your UK provider for rates and availability. Alternatively, purchasing a local Bangladeshi SIM card may be more cost-effective for extended stays. Always ensure your phone is compatible with local networks before traveling.
Purchasing a SIM card from 02 is not difficult. The SIM card can be pay and go, and allows savings on roaming charges. SIM cards can be purchased at mobile stores.
it cost 25 cents each text message
5-10 usd
Depends what country you are in.
Mobile phones will automatically activate the roaming feature if necessary. Roaming time used is chargeable above the contracted monthly rates. There is no reason to manually activate roaming.