Hello,
I have gone through the description, can you provide the API of the sms gateway? Do you want the mobile verification at every checkout or if logged in user done it once, need not have to do it again for next onward purchases?
We have expertise in installing/creating modules/themes for PrestaShop. We can also do code customization for PrestaShop.
We have created modules for PrestaShop. You can see them here [login to view URL]
We have created many PrestaShop sites, below are just to name a few
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We can handle this work easily. As we know PrestaShop inside-out.
Hoping to hear from you soon.
Regards
Sneha