Two major mobile carriers said Wednesday they will postpone sales of new smartphone handsets produced by Huawei Technologies Co. after Washington effectively banned U.S. firms from exporting components to the Chinese tech giant.

KDDI Corp. and SoftBank Corp. have both said they will put off sales of Huawei's new smartphone models for their Au and Y!mobile services respectively, which were initially scheduled to begin later this month.

Another major mobile carrier, NTT Docomo Inc., said the same day it will stop taking orders for the new Huawei handsets, although the company said last Thursday it will launch a new high-end Huawei model in the summer.