Frustrated About Your iPhone's Slow Data Speed? 6 Tips to Boost Your Connection Having slow cellular data speed on your iPhone can be inconvenient at times and, in the worst possible moment, be an utter nightmare. Find out how you can improve cellular data speed and get back to staying connected. Photo : Frederik Lipfert/Unsplash Having weak cellular data can be frustrating. The low signal meter makes messages take too long to send and apps too long to load. Sometimes it can be a mild inconvenience or an utter nightmare. With that said, here are some tips to improve cellular data speed on your iPhone.