電信400電話辦理流程如下所示：一類號碼后六位相同，400+aaaaaaa15358521011。

一個(gè)數(shù)字代碼后五個(gè)相同的數(shù)字-500-400+aaaaaaaaa15358521011一個(gè)數(shù)字代碼后五個(gè)數(shù)字-4009+xabcde15358521011一個(gè)數(shù)字代碼后五個(gè)數(shù)字-15358521011一個(gè)數(shù)字代碼后五個(gè)數(shù)字代碼后五個(gè)數(shù)字代碼后五個(gè)數(shù)字代碼后五個(gè)數(shù)字代碼后四個(gè)數(shù)字-900-9-9-555一個(gè)數(shù)字代碼后四個(gè)數(shù)字代碼后四個(gè)數(shù)字代碼后四個(gè)代碼代碼后四個(gè)代碼后四個(gè)代碼代碼15358521011/9/9/9/9/9/9/9/9/9-5/30-5-5-5-5-9-5-9-5-9-5-5-5-9-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5-5