I want to travel to Germany. Do I need to choose a network for my mobile phone then?

"International roaming" means that mobile phone users can continue to use their mobile phones for voice, SMS and Internet communication in other networks in other countries and regions when they leave their home networks. At present, China Telecom has opened CDMA and GSM international roaming services with operators in more than 2 countries and regions around the world, and the roaming access scope is still expanding. You can continue to use CDMA or GSM mobile phones for communication in these countries and regions. During the roaming visit, China Telecom's global service hotline 1891891 provides 7×24 hours of free labor service. Opening method: Post-paid mobile customers only need to meet any conditions (1. Bank collects customers; Post-paid mobile customers who have been online for more than 3 months and have no current arrears; 3 diamond, gold and silver card customers; 4 green list customers) can open the international roaming function through the handheld business hall, Huan go website, SMS business hall, account manager, business hall and No.1 pre-deposit-free. If roaming to Germany, use the GSM network; if roaming to Germany, use the local GSM network to dial .99 yuan/minute; Answer .99 yuan/minute; Call Chinese mainland (excluding Hong Kong, Macao and Taiwan) at 1.99 yuan/minute, and use **133 to call Chinese mainland (excluding Hong Kong, Macao and Taiwan) at .99 yuan/minute; Call other countries or regions in 3 yuan/min; Sending short messages to Chinese mainland (excluding Hong Kong, Macao and Taiwan) is .39 yuan/article, and sending messages to other countries or regions is 1.29 yuan/article, and receiving is free. Internet access fee is 3 yuan /3MB. For more service offers, click on the "official website" customer service 22 below to answer your questions.