Help S5 not connecting 4g, google apps

[andadroid]

This is driving my wife crazy. This is her second S5. The first one was super glitchy and the store replaced it as DOA. Her new one refuses to connect to 4g.

Here are the symptoms: Gchat never works. She cannot send messages, and her phone will receive messages sent to her hours after they were sent, often all at once. She cannot connect to the play store, esp through games that require play store access. It seems the phone is tripping over wifi, so she will turn that off, and occasionally the phone will connect via 4g--for example, all of a sudden she'll get tons of emails. But it is inconsistent. 4g is strong in our area, and I have no problem connecting, so that's not the issue.

The wireless store is useless. They'll replace the phone, but she doesn't want to set up a new one again. Any ideas for fixes?

 

[Rukbat]

This is driving my wife crazy. This is her second S5. The first one was super glitchy and the store replaced it as DOA. Her new one refuses to connect to 4g.
,,,
The wireless store is useless. They'll replace the phone, but she doesn't want to set up a new one again. Any ideas for fixes?

Regardless of how much a pain it is, the solution is to keep returning the phones to the store until they get so fed up with the situation that they do something about it. The problem is their supplier. It could be a software problem, but I wouldn't want to keep a phone with problems after the warranty runs out. Have it replaced. Have her back up both the apps and the data with Helium. (Since it won't be rooted, there's a one-time setup for Helium - you have to download a Windows program, connect the phone to the computer and run Helium.) Then, oon the new phone, restore everything with Helium. (If there are enough apps it can take a while, but it takes a minute to run Helium, check all the apps and tell it to restore them. Then go do something else.)

If the new replacement is bad, bring it back again. Eventually they'll get the idea. (Replacing a phone is an annoyance for a store. Replacing phones over and over for the same customer is something they're going to get on and fix - they're not going to make money spending 1/2 hour a day with your phone [and the phones of everyone else who's in the store when they hear you say "this is the fifth one you've given us, and none of them have worked" - assuming those people don't go somewhere else to save themselves the problems. Some people just accept a bad phone as "well, what are you going to do, others take the warranty seriously and demand a phone that works. Those are the ones who get working phones. I know. I've owned cellphone stores - and changed suppliers for problems like this.])