What number can I send a text message to 1000 1 to enable international roaming?

Edit the short message number "3432" or the letter "KTGJMY 1" and send it to 1000 1 to open the international roaming function. But the above operation is the premise; First of all, the mobile phone needs to be replaced with Tianyi International Card; Secondly, whether it is necessary to pay the deposit as required. Those who do not meet the above conditions need to go through the relevant formalities in the business hall. For more service benefits, click on "official website" customer service 222 below to answer your questions.