> At least Motorola didn't manage to crowbar their way into the handset contract
Different company entirely and has been for a while (early 2011). The Motorola supplying the ESN is the last remnants of the company which used to make all sorts and then basically got chopped up into unprofitable/dying bits.
There used to be a chipset manufacturing bit, now that's Freescale.
There used to be an automotive bit, sold to Continental a long time ago
There used to be a "Wireless Infrastructure Division", but this was internally fragmented into IDEN & CDMA for the (at the time) lucrative N. America market, TETRA (lucrative) and "proper" mobile phone networks (GSM, UMTS and LTE). IDEN was taken out the back and shot. The "proper" mobile infrastructure bit plus CDMA was gradually eroded by Huawei and eventually bought by Nokia before being shuttered, that left the TETRA bit. This became "Motorola Solutions", which is what is supplying ESN.
There used to be a handset division that made a lot of money out of the RAZR, but due to sheer shortsightedness then died due to too many platforms to support, plus no new products (thanks Ed Zander) resulting it becoming a tiny player that then got sold off for IPR to Google and then (less the IPR) to Lenovo.