| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| YD/T 4163-2022 | English | 229 |
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Days<=3
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(Technical requirements for non-basic telecom operators to support number portability)
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YD/T 4163-2022
| Valid |
YD/T 4163-2022
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