Having a long dilemma between GTEN IQX55 vs OLAX G5018 to pair with a U HOME 5G plan or Yes Flexi 5G plan

Staying in a 2storey with high ceiling hence I would need it to have a acceptable / decent Wi-Fi signal..

Also require a strong 5G signal pull as my area tend to be quite bad at times.. I tried Umobile 5G on iPhoneX, mostly only approx. 2bars... at certain spots will drop to 1bar.. I do get 3 bars but it is really rare..

Initially wanted to go for TP-LINK X50 5G due to the 3years warranty but, somehow I feel, it isn't that future proof for not being 'modded'.. I cant change to any other telco plans easily... Also, will be forced to stay within TPLINK's Deco ecosystem to boost WiFi coverage with their expensive mesh..

As of now, am leaning towards GTEN.. Any kind inputs will be greatly appreciated! Cheers!

Oh sorry I just checked it was an iPhone 12 hahaha my bad!

but the ZTE mc888s will be carrier locked to umobile only right? Didn't want to tie down 24months with umobile just incase the signal gets bad somehow, I can switch other carriers / plans..

5G signal either one bad or one good, apply to others as infra under DNB... this the goodness of SWN....not like 4G where one telco good, one telco bad, one telco initially good suddenly become not good after merger....

What modem they gave ? Is the modem carrier locked ?