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[Q] Why is my Galaxy S4 always switching to Edge connection?

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Phone [Q] Why is my Galaxy S4 always switching to Edge connection?

I have the Samsung Galaxy S4 SGH-I337 Model with AT&T (16GB) and every since I flashed my device using a custom kitkat 4.4.2 rom that is rooted with a tethering add on I have been experiencing problems with my data connection switching from 4G LTE to Edge connection. Also, I am experiencing problems making calls. It takes so long for it to call out. The chime that I hear just before I hear the ringtone can take 30 secs to a minute. It's driving me insane. I just wanted a rooted device on kitkat with tethering. What can I do to resolve this? I appreciate any help I can get with this!

Here is the tutorial forum that I followed when I flashed my device with this custom rom...
The French Tickl3r
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hi there,

quite a complex procedure you followed.. perhaps your device has a mismatch in the modem (radio) . I experienced similar signal drops and disconnections when I inadvertently upped to 442 (NC1) while keeping the MG1 modem..

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