Originally Posted by Sledge
I have two Samsung Galaxy Centura phones from Wal-Mart with Straight Talk/TracFone. One works great between wifi and 3G. The other rarely recognizes the 3G, unless you turn the phone off/on. I've tried calling for support but all I get is the standard "call in to reprogram" which doesn't help. Also tried switching 3G/wifi on and off, but that only works sometimes. Both phones are used from the exact same area, but only one has this issue. Any suggestions?
Because you have TWO phones, and one acts like it's got a signal strength issue, I'm going to suggest trying a super-simple fix...
I ran across this when looking for info on GPS signal problems; it was on a Galaxy S3 forum, but made sense and it worked on my Centura.
Remove the back of the phone, and you'll see a series of small torx screws around the perimeter of the plastic case.
These screws compress the plastic case against the phone's circuit boards; the GPS and cell antennas are part of the plastic case, and there are simple pressure contacts between the antennas, and their respective radios on the circuit board.
The Galaxy S3 guys found that many S3's left the factory with fairly LOOSE screws--some guys got three full turns on the screws--loose screws mean less pressure on the contact points between the GPS/cell radios, and their antennas. If contact with antenna is sketchy, reception & transmission will suffer.
While I didn't find any of my Centura screws 'three turns loose', all screws snugged up by a whole turn or more. My GPS lock quickened, and error circle shrank, under same conditions/location.
The (possible) Fix:
---Turn phone OFF. Remove back, and remove battery.
---With correct torx bit, gently turn down each screw until it bottoms out. Don't gorilla-grip/hamfist tighten the screws; firmly hold the driver with two fingers, and that should do it.
...pop the battery back in, snap cover back on, and compare to the other phone. Hopefully, you just solved the problem.
It's fast, easy and safe, as long as you don't over torque the fasteners.
Let us know if this helped!