Why can't my mobile phone send text messages in groups? It used to be ok!

This is Unicom's Beijing+8613010/2500 or 008613012500 Shanghai +86 13065438+. 04500 Shenzhen +86 130 10888500 or 0086 130 10888500 Shandong+8613010. 613010341500 or 0086 1034 1500 Zhejiang +86 130 10360500 or 0086/. 0 or 0086 130 10380500 Sichuan +86 1 65438 or 0086130165438+6130 0980500 Jilin+861301091500 or 00861301091500. 438+030500 Hebei +86 130 180500 or 0086130180500 Inner Mongolia+86130. 8+030 1070 1500 or 00861500 Anhui +86 130 10305500 or 0086/kloc-0. 6 130 10969500 Qinghai +86 130 107765438 or 0086 130 10765500 Gansu+86/kloc-. 8+030 10796500 or 0086 1079 10796500 Guizhou +86 10788500 or 008610788500 Yunnan +86838. 438+00868500 Hunan+8613010731500 or 008613010731500 Hubei+86/kloc-. 0 Guangdong +86 130 10200500 or 0086 130 10200500 Guangxi +86 1059 1500 or 0086/kloc-. 0076 1500 or 00861301500 Jiangxi +86 130 10720500 or 0086130. For China Mobile, the number of SMS service center is+861380xxxxx500, where xxxx is the long-distance telephone area code of your area. If it is less than 4 digits, it is 0. For example, my Wuhan is 027, that is 0270, which should be +86 13800270500, and if it is 0, it is 0.