[roneythomas6]

No, For x86, They were fine when all mobile CPU's where Single and Dual core. Intel actually had upper hand for a short time thanks to hyperthreading. But once Qualcomm and other ARM SOCs jumped to Quad core, Intel CPU's where power in-efficient and slow compared to other ARM SOCs. So they gave up Smartphone and concentrated on tablet chips for Android and Win8 devices. Later they gave up the Android tablets mainly due to cheap ARM chips from Mediatek and others. As for MIPS they gave up on making SOCs for Android after Imagination Technologies acquired it in 2013. Also keep in mind Smartphone's where growing double digit market share in early 2010's and developers were definitely eager to support whatever new architecture to get market share. Even though there is no x86 smartphone or tablet anymore, the app support is quite good thanks to Chromebooks, Google Play Games for Windows and Android app support in Windows.

[kllrnohj]

Intel had / would have had few significant issues at the time competing on the CPU side of thing. What killed them in phones was the radios. They sucked at them, and buying a discreet chip for it hurt margins and efficiency too much.