Best answer by Max
Please remeber that sharing your IMEI on the community is agains community guidelines. Only send your IMEI to a Huawei Moderator or Huawei Support-team member when asked. Keep your personal information safe. :)
Unfortunately your device is a single-SIM phone. You won't be able to use it as a dual-SIM device since it was not manufactured to be one (is missing the necessary hardware). If it was advertised otherwise we kindly suggest returning it to the retailer.
If the device has only one IMEI numbers it is definitely a single-SIM phone, the model number also points this out (FIG-LX1).
Hope you found this helpful.