Huawei P8 P8 Lite P9 P9-Lite Lite 7-bit character coding error

Dear Huawei!

I would like to ask you the above mentioned devices, improving the 7-bit character encoding errors. Only the default SMS application when using experienced. So a 160-character SMS message can be sent only 2-3. The Huawei Ascend P7 problem has existed since very disturbing. If possible, kindly correct!