With Sprint in a race to keep up with the other carriers they had to move as quickly as possible to upgrade their existing cell sites to 4G to keep from bleeding out subscribers to the competition.In business and in life, sometimes it is easier to ask for forgiveness than it is to ask for permission... The Sprint RRU (remote radio unit) and / or the Sprint RRH (remote radio head) were utilized in the site upgrades to boost and amplify the capacity of Sprint's antennas.Some users of different networks have reported similar service problems, so this may have extended well beyond Verizon's customer base.Whatever the true problem and its source, Apple has issued an official fix.Most landlord's Sprint leases allow Sprint to upgrade their cell sites without consent or having to jump too many hurdles.
In 2006, Sprint exited the local landline telephone business, spinning those assets off into a newly created company named Embarq, which later became a part of Century Link.
As new EVDO towers are installed or new roaming agreements are reached, your PRL will become out of date because it won't know to hunt for these new towers.
You may be in an EVDO area, but if your card doesn't have the tower in the list, it won't know to attempt to connect to the new tower!
So if you’re an i Phone 7 or i Phone 7 Plus user who’s experienced wonky cell service over the course of the last month, check for an over-the-air software update.
Update PM ET, October 17th: Clarified that the i Phone 7's cellular connectivity issues have been occurring with other CDMA-based carriers.