About Us Welcome to ER4 Gadgets your Houston Smartphone and mobile phone repair experts. Let us be your cell phone repair experts! Any model of smartphone, iPhone or Android, or any other type of mobile device, even flip phones, iPad, any model of tablet. Our experienced technicians use the latest high tech diagnostics and repair equipment so you can have peace of mind when trusting your cell phone repair to them. Free estimates let you know up front what your costs are and if replacing your mobile phone might make more sense. But usually, repairing your cell phone or other electronic gadget is less expensive and you get to keep the mobile device you are accustomed to using.