The CDN for downloading Xiaomi firmware has a speed limit.
It is said that a group of people who work on PCDN deliberately increased the downlink traffic in order to reduce the proportion of their uplink traffic. The download address of Xiaomi firmware is easy to obtain, so a lot of traffic was used.
In fact, it is useless. Now the operators do not look at the proportion, but the upstream traffic exceeds a certain number of GB to stop the broadband.
These people did some unethical things that harmed others and themselves: Xiaomi paid an unnecessary amount of traffic fees, and ordinary users had a bad download experience; their broadband was still stopped by the operator.
The default address is bigota.d.miui.com, change it to
CDN for downloading Xiaomi firmware
cdn-ota.azureedge.net
cdnorg.d.miui.com
bn.d.miui.com
bkt-sgp-miui-ota-update-alisgp.oss-ap-southeast-1.aliyuncs.com
Sometimes it can increase download speed
https://bn.d.miui.com/V12.5.15.0.RGGEUXM/begonia_eea_global_images_V12.5.15.0.RGGEUXM_20220826.0000.00_11.0_eea_b8c6b15c15.tgz
or
https://cdn-ota.azureedge.net/V12.5.15.0.RGGEUXM/begonia_eea_global_images_V12.5.15.0.RGGEUXM_20220826.0000.00_11.0_eea_b8c6b15c15.tgz
or
https://cdn-ota.azureedge.net/V13.0.8.0.SJHCNXM/atom_images_V13.0.8.0.SJHCNXM_20230630.0000.00_12.0_cn_acca549dfc.tgz