My country supports 4G LTE, but just different type of it. The country where I live in, provides lte in 800 and 2,600mhz, thats band 20 and band 38. And the iPhone 5 GSM Model A1428 support only bands 4 (AWS) and 17 (700b MHz). And the GSM Model A1429 support bands 1 (2100 MHz), 3 (1800 MHz) and 5 (850 MHz. Would it still work if the LTE chip is slightly different than the service?