I want to travel to Germany. Do I need to select a network on my mobile phone when I arrive?

"International roaming" means that when mobile phone users leave their home network, they can still continue to use their mobile phones for voice, text messaging, Internet access and other communications on other networks in other countries and regions. At present, China Telecom has opened CDMA and GSM international roaming services with operators in more than 200 countries and regions around the world, and the scope of roaming access is still expanding. You can continue to use CDMA or GSM network standard mobile phones for communication in these countries and regions. During roaming visits, China Telecom's global service hotline 18918910000 provides 7×24 free manual services. How to apply for activation: Postpaid mobile customers only need to meet any of the conditions (1. Bank collection customers; 2. Postpaid mobile customers who have been online for more than 3 months and have no current arrears and downtime; 3. Diamond, gold, and silver card customers; 4. Green list customers) can activate the international roaming function through the mobile business hall, Huango website, SMS business hall, account manager, business hall, and pre-deposit-free 10000 number. If roaming to Germany, use the GSM network. When roaming to Germany, use the local GSM network to make local calls for 0.99 yuan/minute; to receive calls is 0.99 yuan/minute; for calls to mainland China (excluding Hong Kong, Macao and Taiwan) 1.99 yuan/minute, use **133 to call China Mainland China (excluding Hong Kong, Macao and Taiwan) 0.99 yuan/minute; calling other countries or regions 3 yuan/minute; sending text messages to mainland China (excluding Hong Kong, Macao and Taiwan) 0.39 yuan/text, sending to other countries or regions 1.29 yuan/text, receiving free. The Internet fee is 3 yuan/3MB. To learn more about service discounts, click the "official website" below and customer service 220 will answer your questions.