Follow the instructions below (carefully mind you) and keep in mind this file works for both jailbroken and non-jailbroken users.If you encounter any issues the official carrier update is available below and you can go right back as if nothing had ever happened.As a quick note to go along with this as @joe012594 is the very some person who provided the list of instructions for jailbroken users to enable LTE on their jailbroken i Phone 5 smartphones at the end of March.
As it turns out, in some cases the carrier update added something good with LTE, but negatively affected the signal and speeds achieved on the company’s refarmed PCS 1900MHz network.
Well, there’s some good news thanks to our friends @joe012594 and @cooldayr2 who have successfully “hacked” the carrier update in the hopes of boosting those speeds.
As it turns out, their efforts were not in vain and they achieved their goal by “increasing the amount of bandwidth allowing for better throughput of data and data connection.” There’s a “tech talk” section at the tail end of the instructions explaining what was done and why it was necessary.
The bottom line is these two guys succeeded in aiding those customers who found their service worse off in a post-carrier update world.
Since many unlocked i Phone 5 users report weakened signal on the refarmed 4G HSPA+ and many i Phone users (unlocked or official T-Mobile versions) report slower data speeds, I have spent many hours for many days doing research on what could be done to fix the issue.
After partnering with @cooldayr, we both have come up with the best possible solution to fix this issue.Below is a fix we have provided for all i Phone 5 users on the T-Mobile network.This website template has been designed by Free Website Templates for you, for free. You can remove any link to our website from this website template, you're free to use this website template without linking back to us.If you're having problems editing this website template, then don't hesitate to ask for help on the Forums.Updated X2: The guide has been updated to fix some of the instructions.As the i Phone 5 launched on T-Mobile’s network, existing AT&T unlocked i Phone 5 customers received a carrier update to enable the LTE signal.