SDHC UHS-I Card should be compatible with SDHC device, but is not fully compatible

Other MicroSDHC cards, 16GB Class4 and 4GB Class10, normal cards not UHS-I, work fine.

Sandisk claims UHS-I to be backwards compatible. Well, for my Huawei it is not fully.

I don’t own another device but I hope to hear soon from other people with other smartphones.

On a PC with the adapter in the card slot or an USB port, the card works fine by the way.